"Saturday Night Live" has swapped one R&B superstar for another -- Mariah Carey will replace Janet Jackson on the program this weekend.

Jackson called in sick after coming down with a bout of influenza at the beginning of the week.

Jackson's illness was so severe she checked into a Los Angeles hospital, suffering from shortness of breath.

But "SNL" bosses have now confirmed Carey will serve as the musical guest on Saturday's show, which will be guest hosted by Jonah Hill.

It's not the first time Carey has replaced Jackson -- Carey took a waitress role in the new film "Tennessee" when reported work commitments and film delays prompted Jackson to quit.

Despite her illness, representatives for Jackson insist the singer will be "fine."

Mariah Carey Sighting at Times Square in NYC

Source: San Francisco Chronicle

She looks wonderful, as always.

Mariah Carey at the BETs 106 and Park at BET Studios