Katy Perry Puts Her Sexy Bikini Body On Display To Take The ALS Ice Bucket Challenge

Justin Bieber Shows Off His Sexy Six Pack In New Instagram Pic

Noelle Talmon Noelle Talmon
October 10th, 2013 10:00pm EDT

Buff Justin Bieber

Justin Bieber has been working hard in the gym as evidenced by a new photo he posted on Instagram on Wednesday. The 19-year-old singer is shirtless and flexing his muscles in the photo, which he captioned: "Me and my trainer."

The pop star recently released the single "Heartbreaker," which he admits is about his break up with Selena Gomez.

The song features a spoken word verse where he says, "So what I'm really trying to say is / and what I hope you understand / Is despite all the imperfections of who I am / I still wanna be your man."

Bieber will be releasing new music every Monday for the next 10 weeks.

Earlier this week, his pal Miley Cyrus posted a photo of herself wearing a t-shirt with an image of Bieber smoking a joint and the tagline "Reefer Fever" on it, an apparent take on "Bieber Fever."

Over the weekend, Bieber was photographed at a party with what looked like a joint in an image obtained by TMZ.com. He was hanging out with a girl who looked like Nickelodeon star Ariana Grande, 20.

Miley Cyrus

Photo Credits: Justin Bieber Instagram, Miley Cyrus via Twitter