Matt Thiessen collaborates with Katy Perry

SONGS writer Matt Thiessen co-wrote Katy Perry's single, "Dressin' Up" off of Teenage Dream: The Complete Confection, a special candy-coated edition of Katy Perry’s 2010 album, Teenage Dream. Released on March 27th, the expanded set is loaded with all sorts of goodies for Katy fans. See the lyric video for "Dressin' Up" below.