Nick Jonas, Demi Lovato, Joe Jonas, and Kevin Jonas attend the 2010 Arthur Ashe Kids' Day

Singer/musician Nick Jonas, singer/actress Demi Lovato, singer Joe Jonas, and singer/musician Kevin Jonas 

Nick Jonas,  Demi Lovato,  Joe Jonas, and  Kevin Jonas attend
the 2010 Arthur Ashe Kids' Day at the USTA Billie Jean King National Tennis Center

Kevin Jonas, Nick Jonas and Joe Jonas pose with Frankie Jonas at the premiere of 'Camp Rock 2: The Final Jam'

Musicians Kevin Jonas, Nick Jonas and Joe Jonas pose with Frankie Jonas at the premiere of 'Camp Rock 2: The Final Jam' at Alice Tully Hall, Lincoln Center