United Kingdom, April 26 -- Kimberly Wyatt says Christina Aguilera has earned the right to be a diva - because she is so talented.

The 43-year-old singer-and-dancer "spent a lot of the time" with the 'Genie in a Bottle' hitmaker when Kimberly's girl group the Pussycat Dolls opened her 'Back to Basics' tour in 2007, and the 'Don't Cha' singer was in awe of her vocals and although Christina "might be a bit of a diva" she has the talent to back up the attitude.

Speaking to the UK edition of Closer magazine, she said: "I spent a lot of time with her.

"She's an interesting human, but I have such an appreciation for her talent.

"She's one of the best voices of our generation - standing next to her and hearing her sing, the strength in her v...