Kate Moss & Beth Ditto (Gossip gossip)
"Kate Moss was spotted hanging out with indie singer Beth Ditto (right) after her band Gossip performed in LA." [The Superficial] (thx Julia)
According to NME, Kate Moss was also "rocking out in the balcony" earlier in the night at the Saturday night show at The Troubadour in Los Angeles.
Gossip's remaining two tour dates are this Thursday in Chicago, and this Saturday here in NYC - then the True Colors tour which has them sharing a stage with Rufus Wainwright in MA & MD, and brings them to Radio City Music Hall on June 18th (not where I would want to see Gossip).