Mariah Carey Lights ‘Matches’ For ‘Ally McBeal’ Role

'Glitter' girl, Jon Bon Jovi making debut in same episode.

Even fabulously big superstars like Mariah Carey need the help of a dating service … if you can believe what you see on TV.

In “Playing With Matches,” an upcoming episode of the Fox TV show “Ally McBeal,” Carey will play the client of a matchmaking business who testifies at the company’s trial.

The singer will also take the stage at McBeal’s nightclub hangout to perform “Lead the Way,” according to a representative for David E. Kelley, the show’s creator. The song is featured on the soundtrack to Carey’s big-screen venture, “Glitter.”

Carey, who follows in the guest-role footsteps of Elton John, Sting and Chubby Checker on the show, will shoot her part in Los Angeles this week.

Set to air January 7, “Playing With Matches” will also mark the debut of Jon Bon Jovi in a recurring role as a potential love interest for McBeal (see “Bon Jovi Puts ‘Ally McBeal’ On Hold To Play Benefits” ).

“If you saw ‘Moonlight and Valentino,’ that’s who I am,’ ” Bon Jovi said Saturday, referring to his 1995 movie role as a house painter who turns the crank of every woman around. “Basically I’m doing nine episodes as a way for my movie career to continue to grow.”

He said he planned to shoot “Ally McBeal” through Valentine’s Day and then turn his attention to the next Bon Jovi record.

For a feature interview with Mariah Carey, check out “Mariah Carey: Under Pressure” .