Joe Jonas is leaving very little to the imagination as the face of Guess' Spring 2017 underwear campaign, alongside model Charlotte McKinney. The 27-year-old DNCE frontman puts his abs on full display in the steamy pics, and it's clear he hasn't been slacking on his fitness.
Of course, he also has plenty of chemistry with 23-year-old McKinney. The two are already well acquainted -- the Baywatch star made out with Jonas for DNCE's sexy "Body Moves" music video.
The new campaign is art directed by Paul Marciano, Chief Creative Officer for Guess, and is shot by famed photographer Yu Tsai.
"It feels great to be chosen by Paul Marciano as the male global ambassador for the new Guess Underwear campaign with a focus on the Guess man," Jonas said in a statement. "I am excited to be part of this amazing experience and to be able to represent the brand's image."
Jonas told ET in November that he definitely "upped" his workout regime while touring with DNCE with the help of a traveling personal trainer.
See more photos of Joe Jonas through the years:
LOS ANGELES, CA - JULY 08: Singer Joe Jonas of DNCE performs at Staples Center on July 8, 2016 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
AUBURN HILLS, MI - JUNE 24: Joe Jonas of DNCE performs during the Revival Tour at The Palace of Auburn Hills on June 25, 2016 in Auburn Hills, Michigan. (Photo by Scott Legato/Getty Images)
MIAMI, FL - JUNE 11: (L-R) Jack Lawless, Joe Jonas, Cole Whittle and Jin Joo Lee participates in DNCE Hits 97.3 Live Session on June 11, 2016 in Miami, Florida. (Photo by Thaddaeus McAdams/WireImage)
NEWARK, NJ - JUNE 02: Singer Joe Jonas and guitarist JinJoo Lee of the band DNCE performs during Selena Gomez in concert at The Prudential Center on June 2, 2016 in Newark, New Jersey. (Photo by Brian Killian/Getty Images)
NEW YORK, NY - JUNE 02: Joe Jonas of the band DNCE performs live on SiriusXM Hits 1's The Morning Mash Up at SiriusXM Studios on June 2, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)
NEW YORK, NY - JUNE 01: (L-R) Musicians Jack Lawless, JinJoo Lee, Joe Jonas and Cole Whittle of band DNCE visit Music Choice on June 1, 2016 in New York City. (Photo by Monica Schipper/Getty Images)
LAS VEGAS, NV - MAY 22: (L-R) Musicians Jack Lawless, JinJoo Lee, Joe Jonas, and Cole Whittle of DNCE attend the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada. (Photo by Lester Cohen/BBMA2016/Getty Images for dcp)
CARSON, CA - MAY 14: Singer Joe Jonas of DNCE and actress/singer Hailee Steinfeld perform at 102.7 KIIS FM's Wango Tango 2016 at StubHub Center on May 14, 2016 in Carson, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
CARSON, CA - MAY 14: Singer-songwriter/musician Joe Jonas attends the 102.7 KIIS FM's Wango Tango 2016 at the StubHub Center on May 14, 2016 in Carson, California.(Photo by Jeffrey Mayer/WireImage)
"She works us really hard, I mean, when we have free time because obviously our times are really short, but we try to get it in," Jonas said. "I think for all of us, we run around like maniacs onstage and that alone is probably our cardio -- enough to kind of get us in that shape -- but, yeah, I definitely, obviously upped it up a bunch."