Maroon 5's Super Bowl Halftime Features Shirtless Adam Levine

The Super Bowl LII halftime came and went, and it featured A LOT of Adam Levine ... who stripped down until there was practically nothing left up top.

Maroon 5 took center stage Sunday midway through the big game, and they ran through a bunch of their early hits to kick things off. As the show went on, Adam lost more and more layers from his torso ... until he was fully shirtless by 'Moves Like Jagger' at the end.

Travis Scott and Big Boi made brief appearances as well -- each of them performed one verse and a hook of their songs, "SICKO MODE" and "The Way You Move," respectively. No guest appearances here though, even though both songs featured big artists like Drake and Andre 3000. Even…