Stripping down to soak up some rays, Justin Bieber ditched his T-shirt and shorts to relax poolside in his undies in Miami on Monday (January 28).

The 18-year-old pop star was left with just a pair of black and white boxerbriefs as he revealed his bare chest and a few of his many tattoos.

As the anticipation grows for his Believe Acoustic album which drops on Tuesday, the "Beauty and a Beat" singer recently spoke to Billboard about a new track, "Nothing Like Us" which is about ex-girlfriend Selena Gomez.

Speaking about the tune, the Biebs explains, "Because at the end of the day, there's nothing like us, you know? That's just it. It is what it is. People are going to relate to that."