PopUps: Bieber Shows Off Abs, New Hairstyle & Shares New Song via Instagram

Justin Bieber was pretty active on Instagram over the last few days, showing off his six-pack, his new lavender haircut as well as sharing a snippet of an unreleased track.

It all started on Saturday, when the "Sorry" singer posted a nearly-naked pic of himself wearing nothing but his Calvins and grabbing his crotch. "Sweet dreams," Bieber captioned, adding the popular crying-while-laughing emoji.

The photo, unsurprisingly, earned 2.1 million likes.

Not long after that, The Biebs posted two selfies, showing off his new hairstyle: Bieber, 21, who is no stranger to switching things up when it comes to a new do, now sports flowing lavender hair.

The pics earned 1.9 million and 2.1 million likes respectively and even garnered the attention of "Orange is the New Black Star" and Bieber's friend, Ruby Rose, who playfully mocked the pop star's selfie in her own recreation.

But Bieber didn't stop there: On Sunday, he posted a couple of shirtless photos of himself in just a towel, most likely in a post-workout session: "Back in the gym," he wrote.

Bieber was all about the music late Monday night, posting three video snippets of what appears to be a new track. Entertainment Weekly reports the song is called "I'll Be There" and the full song, a dark and twisting R&B slow jam, is now on the singer's Vevo page. Check it out below.

This story is part of our special report: "PopUps". Want to read more? Here's the full list.