Carey’s pooch pees in her dressing room

LONDON: A little toilet trouble almost wrecked MARIAH CAREY's rehearsals for her opening night in Las Vegas on Friday (11Sep09) when the diva's dog peed all over her dressing room floor.

Carey is in Sin City for a two-night stint at The Pearl and was preparing for a soundcheck backstage when Cha Cha, the Jack Russell husband Nick Cannon gave her as a wedding anniversary gift earlier this year (09), soaked the floor and then jumped all over the singer.

Taking to her Twitter.com blog to post all about the mishap, Carey wrote, "Cha Cha just peed on the floor in my dressing room and then decided to jump on top of me as I am doing my make-up. 'Real classy' here."