Justin Bieber continues his #MusicMondays series. Following “Heartbreaker” last week, the 19-year-old superstar serenades a special lady with “All That Matters.” Over a stripped-down instrumental, he pours his heart out, while showing off his vocal chops.

“You make me complete/ You’re all that matters to me/ What’s a king bed without a queen?” sings Justin.

He plans to drop a new single or “journal” every Monday for the next 9 weeks leading up to the release of the Believe movie in December.

“I love #journals because i can be honest & share how i feel & i love the #BelieveMovie because it will answer all the lies & show the truth,” he tweeted.

Hear Justin’s sweet serenade below.