{blackbabes} Mariah Carey and Adele -- Top Colosseum Wish List as Celine Dion Bows Out

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Mariah Carey could pull a Britney Spears by taking her kids to Vegas and pulling down a huge paycheck to do shows there -- as Caesars Palace eyes huge new names to put on it's marquee.

TMZ has learned the Colosseum -- where Celine Dion has had a residency for years -- would love to sign soon-to-be single Mariah for a very lucrative weekend engagement. Our sources say the offer that went out was $750k for two shows!

We're told the Colosseum's operator, AEG is targeting a bunch of other heavy hitters too, including ... Adele, Blake Shelton and Miranda Lambert, Prince, and Bruce Springsteen.

Comedians Chris Rock and Chelsea Handler -- who both sell out bigger arenas than the Colosseum which seats about 4,300 -- are also wanted.

We're told this dream list was put together long before Celine's recent announcement she was taking a leave of absence until next spring to be with her ailing husband.

As it turns out, there will be plenty of open dates to fill. So far no one's signed on the dotted line.