Mariah Carey's canines on the couch

Mariah Carey's dogs are in therapy to prepare them for the arrival of her twins.

The singer is currently expecting her first children with husband Nick Cannon but is so worried about the psychological impact their birth will have on the couple's four Jack Russell terriers - JJ, Cha-Cha, Dolomite and Jackie Lambchops - she has taken them to a pet psychologist.

An expert on Jack Russells said they "can be jealous and possessive about their owners".

Mariah, 41, has previously revealed her pooches lead a pampered life and even had their own entourage when they once took part in a video shoot with her.

She said: "I had my team with me but the pups had a mini entourage of their own, of course! And why wouldn't they? It was a big shoot and even my entourage had an entourage - my stylist had an assistant, my security had extra security."

On their first wedding anniversary in April 2009, Nick presented to Mariah - who already had the dog JJ - her second pooch, a baby Jack Russell terrier they named Cha-Cha, who later gave birth to puppy Dolomite.

Jackie Lambchops, the latest addition to their canine family was born in June last year.