Who wore what: iHeartRadio Jingle Ball, Billboard Women in Music Luncheon and more!

From Z100's Jingle Ball to the Billboard Women in Music Luncheon, we saw our favorite stars sporting their Hollywood best as they dazzled on the red carpets over the past few days. Some star-studded events we're simply for the love of music and film, while others were honoring the best in the industry.

SEE ALSO: KIIS FM's Jingle Ball, Kennedy Center Honors Gala and more

The biggest theme we noticed was celebs stunning in all black! We especially loved Shay Mitchell's sheer Oglialoro Couture dress. The above the knee getup showed off her toned legs and arms, as she paired it with a dark lip and open-toed strappies. We also loved Demi Lovato's Tom Ford blazer. We're obsessed with the fact that she wore it with nothing underneath -- rocking the sexy, sophisticated look.

While many stars strutted down the red carpet in short dresses, another popular look this weekend was rocking the ball gown look. From Marta Dusseldorp's Escada gown and Cate Blanchett's Armani ensemble, to Anna Bamford in Carla Zampatti -- stars proved that a gorgeous ball gown never goes out of style.

Click through above to see who wore what this weekend and take our poll below.

Watch below to see more of Selena Gomez at the iHeartRadio Jingle Ball:

Selena Gomez Has Busy Night At Jingle Ball NYC
Selena Gomez Has Busy Night At Jingle Ball NYC

More celebrity style:
Who wore what this weekend: Kylie Jenner's epic birthday party, Teen Choice Awards and more
Fab or flop: Kim Kardashian's skin-tight two piece, Meryl Streep's funky jumpsuit
Fab or Flop: Kim Kardashian's completely sheer look, Scarlett Johansson's sexy leather top and more