Sam Ronson Joins Stepdad For Foreigner Show

Samantha Ronson showed off her singing skills on Tuesday night when she joined stepfather Mick Jones and his band Foreigner onstage at sister Charlotte’s Los Angeles fashion launch party.

The musical family all played a part in the JC Penney party entertainment, but Samantha's singing talents were the talk of the night. A partygoer tells FemaleFirst; "She was good. She knew all the words and had a very delicate voice... She was very excited to be onstage with the band and screamed, 'I'm singing with f**king Foreigner'."

Paris Hilton and Mischa Barton were also among guests at the party, held at Hollywood's Milk Studios.