The Mirror hears the Pussycat Dolls’ dressing room at the O2 Jingle Bell Ball in London was accidentally occupied by The Saturdays due to a mix-up. “It was confusion all round,” a source told 3AM. “The Saturdays were thrilled with their huge dressing room, and even more surprised to see Rihanna. She’d popped in to see the Dolls, which is how the mix-up came to light. Luckily, everyone saw the funny side.” Meanwhile, Sugababes were photographed backstage with the 3AM reporters.