The 26-year-old X Factor runner-up - who came under fire for dating 19-year-old Zayn - broke up with the One Direction star in July last year after four months together to focus on her career.
Meanwhile, Rebecca was a dead ringer for fellow X Factor star Leona Lewis at her iTunes Festival show at London's Roundhouse this weekend.
The singer was sporting a heavy fringe and straight locks as she took to the stage, which she teamed with a t-shirt emblazoned with the slogan 'Chic Happens'.
Rebecca is currently in a legal dispute with her former management company after parting ways with them in June.
Modest Management are suing her for breach of contract and are demanding 20% of her earnings for the next three years because, they claim, she signed a five-year contract with them and 'unlawfully' terminated it.
Talking about the lawsuit last week, Rebecca said: "Business is business … it won't break me."