Christina Aguilera collaborating with boyfriend?

The 31-year-old 'Beautiful' hitmaker, who met him two years back on the sets of her movie musical "Burlesque", said she is enriching her relationship by sharing the work for her upcoming seventh studio release, reported Contactmusic.

"Matt has come a long way from being a production assistant on Christina's movie Burlesque. He's now a songwriter, working on new tracks for her new album. People will be surprised by the sound they've put together," said a source.