LISTEN Justin Bieber New Songs Snippets Unveiled on Instagram, YouTube: Music Mondays Follow Up to 'Heartbreaker' Add Diversity to Music Journals Project [VIDEOS]

Justin Bieber's Music Mondays and music journals project is well underway. On Sunday (Oct. 6), the "Baby" singer's highly anticipated single "Heartbreaker" was finally released online, alongside a short description from Bieber about the song's meaning. Shortly after debuting "Heartbreaker," Bieber teased two new tracks on Instagram and YouTube, giving Beliebers a taste of more new music to come.

The first snippet of a new song appears in an Instagram of Bieber's manager Scooter Braun dancing oddly and acting like Rodney Jerkins, whom the singer describes as a "legend." A previously unheard song from Bieber highlights the short video. The majority of the lyrics are hard to make out, but a reprise of "rollercoaster" can be heard several times.

Unlike "Heartbreaker," which is a smooth, mature R&B ballad in the classical sense, this song is a modern pop affair and much more familiar to Bieber's typical sound. The bopping beat throbs as Bieber's light, high vocals compliment the instrumentation.

The second unheard track from Bieber surfaced in a YouTube video from user Tiana Felix on Oct. 6. The 12-second clip features another new Bieber musical snippet while the pop star himself -- dressed in red gym shorts and a white T-shirt -- dances to the beat and sings along to his own song.

Once again, this snippet differs from both "Heartbreaker" and the Instagram video song by incorporating heavier hip-hop rhythms and deeper vocals from Bieber.

(via ONTD)

Thus far, the music journals and Music Mondays project from Bieber is shaping up to include a diverse set of music.

Though "Heartbreaker" was confirmed as the first song for Music Mondays leading up to Oct. 7, the new track for Oct. 14 have yet to be revealed. It's also likely that two songs could drop next week, as Bieber teased on his Twitter on Oct. 7.

maybe u might get lucky with two songs in a week

— Justin Bieber (@justinbieber) October 7, 2013