Justin Bieber's Best Journals Track? Madison Beer Breaks It Down

'Melodies' singer says, 'I love them, every song,' before revealing a favorite to MTV News.

Justin Bieber's full Journals are out and ready for fans to listen to on repeat. With 15 songs to rock out to over the holiday break, Bieber's pal, singer Madison Beer, already has one song on replay.

"The highlight of Justin Bieber [in 2013]? I think that Music Mondays [are]. I love them, every song," she dished to MTV News at the premiere of Bieber's concert documentary, "Believe," last week in Los Angeles.

"They're amazing. I do [have a favorite]! I think that 'All That Matters' is my favorite, if I had to choose,' " she added.

December is a pretty big month for Bieber. It marks the official release of Journals, a compilation of Bieber's Music Mondays songs, as well as five new songs, including tracks with Lil Wayne and Big Sean. The singer will also release his Jon Chu-directed "Believe" documentary on Christmas Day.

This month also caps off a busy year for Beer, who caught the pop world's attention with the release of the video for her single "Melodies." The clip features Bieber, who discovered her online in the summer of 2012. Beer says having Bieber in the video was "amazing; it was kind of surreal for me."

Next up, the 14-year-old is prepping the release of her own debut album, which might also include Bieber. And she's taking Bieber's advice to heart. She shared that the 19-year-old told her "to not give up. 'Cause it's definitely hard being so young and [to] be in the industry. I know you hear it every day, 'never give up, never give up,' but coming from him, it means so much."