Calvin Harris is back at it again with the shirtless selfies. On Tuesday, the Scottish DJ took to Instagram to wish his manager a happy birthday with a pretty steamy snap. Not only did he show off his impeccable abs, but he also leaves little the imagination by donning nothing but his Emporio Armani briefs. The sexy photo comes on the heels of his recent win for best male video for "This Is What You Came For" at the MTV Video Music Awards on Sunday. While it was recently revealed that Taylor Swift secretly wrote the track when they were dating, he didn't thank his ex during his pretaped acceptance speech. Perhaps there is still some bad blood brewing between the two.