Kim Kardashian partied with Oprah Winfrey and Mick Jagger at Liberty Ross' birthday party on Saturday night (21.09.13).

The 'Keeping Up with the Kardashians' star hit the town for a second night out over the weekend to attend a star-studded celebration for the British model in Los Angeles, ahead of her 35th birthday on Monday (23.09.13).

The 32-year-old reality TV star, who enjoyed her first night out since giving birth to her daughter, North West, in June, with her boyfriend Kanye West, rapper Tyga and his girlfriend Blac Chyna at Hakkasan restaurant on Friday night (20.09.13), was spotted chatting to Oprah and P. Diddy at the party in Liberty's boyfriend Jimmy Iovine's house, according to gossip website

Other celebrities at the event included movie producer Brian Grazer, rapper Dr. Dre and R&B star R. Kelly, who gave an impromptu performance.

Liberty - who is divorcing her estranged husband Rupert Sanders following his fling with 'Twilight' star Kristen Stewart last year, and has asked for joint custody for of their children, Sykla, seven, and Tennyson, five, as well as spousal support - began dating Interscope Records co-founder Jimmy in February.

The 60-year-old executive has helped produce albums for artists such as Tom Petty & the Heartbreakers, U2, Stevie Nicks, Simple Minds, Dire Straits and Lady Gaga.