Lady Gaga's net worth on her 31st birthday

"Mother Monster" Lady Gaga turns 31 on March 28, fresh off her successful performance at the Super Bowl 51 halftime show.

Plans to celebrate this year's birthday have not been publicly disclosed, but past celebrations have run the gamut: In 2011, Gaga kicked fellow musician Adam Lambert out of her party for his raucous behavior. In 2014, she took in a Broadway show starring pal James Franco.

Whatever she does, Gaga has many "Million Reasons" to celebrate — most of which come with dollar signs. Here's a look at the international superstar's wealth from the start of her career to today.

Lady Gaga Net Worth: $275 Million

In 2008, up-and-coming artist Lady Gaga — Stefani Joanne Angelina Germanotta — scored a songwriting gig for an Interscope Records imprint. The same year saw the rising star lend her powerhouse vocals to New Kids on the Block for the boy band's comeback album. Although Def Jam Records dropped Gaga during this time, she was soon snapped up by R&B singer Akon for his Kon Live Distribution label.

Her debut album, "The Fame," propelled the singer to major popstar status. "The Fame" was only the first of many successful ventures for Gaga. Today, the artist's net worth is $275 million, according to CelebrityNetWorth.com. The international superstar earned $59 million in 2015 and $33 million in 2014.

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Lady Gaga Music

Of Lady Gaga's six albums, "The Fame" is still the most successful, selling more than 15 million copies worldwide and earning her $18 million, according to celebrity publication TheRichest.

In 2011, she released her mega-hit album "Born This Way," which set the record for the fastest rise to the No. 1 spot on release day. The album sold six million copies worldwide and earned the singer $8 million. She went on to release "Artpop" in 2013, selling 2.5 million copies. In 2014, she paired up with Tony Bennett for the jazz album "Cheek to Cheek," which sold less than a million copies.

In 2015, two Lady Gaga songs — "Just Dance" and "Poker Face" — passed the seven million download mark, making her the only artist to have two songs reach this level. Her other top hits include:

"Bad Romance"
"Born This Way"
"Applause"
"The Edge of Glory"
"Paparazzi"
"Telephone"
"LoveGame"
"Alejandro"

Her latest solo album, "Joanne," was released Oct. 2016 and debuted at No. 1 on the Billboard 200 chart dated Nov. 12, 2016. The album has sold 435,000 units domestically.

Following her Feb. 5, 2017, 13-minute performance at the Super Bowl halftime show, Gaga saw a 1,000 percent surge in music sales, according to Nielson Music. The singer sold around 150,000 digital songs and albums that day alone.

Lady Gaga Concert Earnings

Since Lady Gaga's fans — nicknamed "Little Monsters" — can't get enough of her music, it's no surprise the artist's tours are a major contributor to her net worth.

Gaga's 2008 "The Fame Ball" tour earned $3.15 million, followed by the 2011 "Monster Ball" tour, which brought in $227.4 million. The 2013 "Born This Way" tour generated $168 million in gross income.

In early 2017, Gaga announced a new world tour for "Joanne," which will kick off at the Coachella Valley Music and Arts Festival in Indio, Calif. The singer — who will likely earn between $3 and $4 million for her back-to-back weekend performances, according to Billboard — filled the headlining spot after Beyoncé dropped out following her Feb. 2017 pregnancy announcement.

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Lady Gaga on Screen

Lady Gaga has found success on the small screen as well as the stage. In 2015, Gaga joined the cast of "American Horror Story: Hotel" and showcased some serious acting chops. On "AHS," she played The Countess and mysterious owner of Hotel Cortez. The star's "American Horror Story" performance received rave reviews and helped revive her image after the much-criticized "Artpop" fail.

She is set to star in "A Star Is Born," a movie about an actor who helps a young singer/actress find fame, despite his own demons. The film, which also stars Bradley Cooper, is slated for release in 2018.

Lady Gaga Awards

Lady Gaga's talent as a musician and actress have earned her numerous awards. Gaga's music has won her six GRAMMYs, 13 MTV Video Music Awards, eight MTV Europe Music Awards, seven Billboard Music Awards, three People's Choice Awards and an American Music Award.

Lady Gaga's performance in "American Horror Story: Hotel" earned her the 2016 Golden Globe Award for "Best Performance by an Actress in a Limited Series or a Motion Picture Made for Television" category.

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Lady Gaga Business Ventures

Not only is Lady Gaga a brilliant creative mind, she's also a savvy businesswoman who knows how to market her brand. The superstar has partnered with a host of companies in a range of industries to generate name recognition and boost her ever-growing fortune.

From 2010 to 2014, Gaga was the creative director for a specialty line of Polaroid imaging products. Also in 2010 and 2011, she served as a spokesperson for MAC's Viva Glam campaign, which raises money for the MAC AIDs fund. In 2014, the singer was the face of the Versace Spring/Summer campaign and also starred in the Japanese cosmetic company Shiseido's 2015 "Be Yourself" campaign.

After opening a temporary workshop at the store during the 2011 holiday season, Lady Gaga was featured in the Barneys New York Spring 2016 campaign. The popstar also has two of her own fragrances; "Fame" debuted in 2012 and sold six million bottles its first week and 30 million in less than a year.

In 2016, the singer's startup, Backplane — a social media platform for her fans — went bankrupt. Gaga had partnered with Google in 2011 on the venture, which was initially valued at $40 million.

Lady Gaga and Her Investments

On Valentine's Day 2015, Lady Gaga's boyfriend Taylor Kinney proposed to her in Manhattan, and the singer said yes. In exchange, Gaga received a heart-shaped platinum engagement ring — thought to be about 8 carats — worth an estimated $500,000.

The couple had been dating since 2011, when Kinney starred in the music video for Gaga's hit song "You and I." They later broke up in July 2016, ending their engagement. In Feb. 2017, she was linked with CAA talent agent Christian Carino.

Aside from creating chart-topping hits, Gaga has an affinity for the good life. In 2014, she bought a 10,270-square-foot Malibu, Calif., mansion for $23.5 million. In 2016, she reportedly bought the $5.25 million Hollywood Hills home of musician Frank Zappa, according to Variety.

Not surprisingly, the trend-setting Gaga has a soft spot for fashion. In 2012, she paid a record-breaking $121,758 for an Alexander McQueen gown at an auction from the personal collection of Daphne Guinness.

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