Brandon Boyd of Incubus. The video for "Drive" is especially notable for its many low-angle shots of his abs.
A good number of rock drummers, as flailing one's limbs is far easier without fabric. Those who do wear shirts generally don't wear anything longer than t-shirts. Averted with Jazz drummers more often than not due to the different technique.
ZP Theart, formerly of DragonForce, often goes shirtless onstage.
Bobby Blitz of Overkill is frequently seen shirtless on stage, and for a 50-year-old man, he's absolutely ripped.
Ditto for Geoff Tate of Queensryche, who likes to go onstage in a leather jacket with no short underneath. Ye-ow.
Freddie Mercury in the 80s. In the Radio Ga Ga music video, all he wears on his upper body are some red ribbons.
In '70s concerts, he rocked scoop-neck leotards: the scooped necklines went all the way down to his navel◊.
Eugene Hutz of Gogol Bordello tends to go shirtless at all of their concerts.
Country singer Kenny Chesney appears without a shirt in his music videos and his bus and billboard advertisements.
The video for "Connection" by Elastica shows the band being surrounded by naked male models.
The video for her debut single "What Made You Say That?" has Shania Twain frolicking on the beach with a barechested, musclebound love interest.
Gorillaz' 2D went topless in the "Dirty Harry" music video, and Murdoc wanders around shirtless a lot of the time. It's debatable whether either or both of them are Fanservice or Fan Disservice, though ...
The was certainly Fan Disservice to be had for the old "Rock The House" music video, with Murdoc sporting some serious skin and not-so-serious physique.
The aforementioned video also featured him batting away projectiles via groin-thrust.
Sting spends some time bare-chested in the video for 'Don't Stand So Close To Me'. While there's two different 'sets' (classroom, random romping area), the shirtless scene is during a classroom segment.
Gackt's YFC tour has him pulling off his tie then ripping off the white sleeveless shirt. Then resumes to go shirtless for the rest of the concert. Why? Does it really matter?
The first guy's shirt is totally unbuttoned in the video for "As If" by Sara Evans