‘The Hills’ Stars Kristin Cavallari & Heidi Montag Reunite For ‘Barbie Girl’ Lip Sync Video: Watch

See Christina Hall and More HGTV Stars Bring Barbie's Dreamhouse to Life (Exclusive)

Kristin Cavallari Gets Her ‘Kiddos’ Zodiac Signs Tattooed on Her Body

Kristin Chenoweth & Josh Groban to Present at 45th Annual New York Honors Gala