Teen star Cody Simpson aims for a mature sound on his latest single 'So Listen,' which features a cameo from T-Pain.

Simpson and his guest rapper make heavy use of Auto-Tune throughout the song. While the 15-year-old obviously doesn't need the gimmick, he's going for a more current style, and the vocal technique fits the R&B-influenced track, which finds the young singer wooing a potential girlfriend.

The hook brings a huge, wobbling computerized bassline, while Simpson sings simply, "So listen to me / So listen / Listen to my heartbeat." T-Pain raps, "I'm just trying to love you / Can I get a witness? / Let the church say amen / Cause I know that you need a man / And Im gon' do whatever I can / To stop with all the dissin' / Get to the kissin' / Baby you know what you missin.'"

'So Listen' carries an understated, ultra-cool vibe, much like Joe Jonas' 'Just in Love,' and somehow finds a home at the intersection of R&B, hip-hop, teen pop and electronic dance music. It's not a perfect fit for Simpson, but he doesn't sound out of his element, either. It appears that the Aussie singer has found a new sound he can grow into.

'So Listen' is available now on iTunes. The song is expected on Simpson's next album, which is due later this year.

Listen to Cody Simpson, 'So Listen' Feat. T-Pain