She has enjoyed a meteoric rise to fame over the last couple of years, making her one of the most famous pop stars in the country So it’s no surprise Rita Ora was asked to take part in a star-studded concert to mark the 20th anniversary of Stephen Lawrence’s death on Sunday evening.And making sure it was a night to remember the 22-year-old not only looked but sounded show-stopping as she joined a whole host of pop stars to pay tribute to the teenager’s mother at Unity: a concert for Stephen Lawrence in London’s O2 arenaShowing off her incredible figure the How We Do singer wore a floor-length red lace dress which featured long sleeves.But while the dress may have covered all her body the lace detail meant her slim legs could be seen beneath as she wore just a body–suit underneathCompleting her sexy stage look she wore her hair long and sleek, while of course she completed her look with her trademark red lipstick.Jessie J, Emeli Sande, Rita Ora, Beverley Knight, Ellie Goulding and Jamie Cullum all joined her to perform to a sell-out crowd of 16,500 at Unity: a concert for Stephen Lawrence in London’s O2 arena Speaking at the event Jamie Cullum, who was 14 when Stephen was stabbed to death in a racist attack in 1993, said: Tonight is about raising money and raising awareness, but it’s also a celebration of what Doreen has achieved It was the first news story that really resonated with me and continues to resonate. Doreen’s struggle shows what an incredibly powerful lady she is and what an amazing thing for British politics.