The "O-Town" stud is no stranger to posting sexy selfies on Twitter, but his latest photo might be his most revealing yet.
In his new Instagram pic, the singer posed completely naked -- in bed -- with just a sheet covering up his goods.
"Early morning workout today -- can I go back to bed now? 💤 #Day21 #100DaysOfFitness #exercise #fitness #fitfam #gymlife #dedication #tourlife," he captioned the steamy snapshot.
The 33-year-old singer has been focusing on his fitness, previously saying he's "committed to getting in the best shape of my life" on his Instagram page. "Though I'm not exactly where I want to be yet - I'm as committed as ever to getting there," he said last year.
These days, Ashley has branched away from music and is now working on film and television projects, as well as playing Fiyero on a tour of the musical "Wicked."
Parker's old boy bandmates -- Trevor Penick, Jacob Underwood, Erik Michael Estrada and Dan Miller -- recently reunited without him and even released some brand new music.
toofab's Brittany Kyles caught up with the guys in Hollywood, where the group dished on their new album, their reality TV regrets and what they really think of Parker's racy pics. Check out the clip above and enjoy another sexy selfie below!