Charlie and I are working on a duets album. You can hear the first song we wrote together ("I Don't Have Time To Be In Love" on my new album (coming out on May 3rd). Or you can watch a version we did of it together in proper duet style here.
I am a HUGE fan of Charlie's. If you don't know his music, I highly recommend checking it out. His gorgeous song, "My Love" was featured at the end of the movie Cyrus. You can listen to it here.