The Collapsable Hearts Club

Petra Haden (born October 11, 1971) is an American musician and singer. She is the daughter of the jazz bassist Charlie Haden and Ellen David, and is the triplet sister of bassist Rachel Haden (her bandmate in that dog.) and cellist Tanya Haden (married to singer and actor Jack Black); she has performed with her sisters as The Haden Triplets. She is also the sister of bassist-singer Josh Haden, leader of the group Spain.