MCareyCannon102008_01_X17.jpgMariah Carey MCareySting102008_003_X17.jpg

Both couples were on hand for the 2008 Whitney Museum of American Art Gala in New York City last night.

Although they said it wouldn't last, Mariah and Nick have already been married for about four months. Sting and Trudie, on the other hand, have been happily married (and unmarried) for about 25 years.

Think Mariah and Nick will last as long as Sting and Trudie?