The list of acts featured on this year's Grammy Awards keeps growing. The latest additions to the telecast include the interesting pairing of Beck with Chris Martin of Coldplay. No official word as to which song they will perform, though a safe bet might be 'Blue Moon' from Beck's most recent album, 'Morning Phase,' as that song has been nominated for Best Rock Performance and Best Rock Song. 'Morning Phase' is also nominated for Album of the Year.

This, of course, is one of many now expected performer mash-ups, the oddest of which might be Kanye West, Rihanna and Sir Paul McCartney. Sam Smith will team up with Mary J. Blige, and the dynamic duo of Tony Bennett and Lady Gaga will also make an appearance.

By sheer size, the biggest mash-up looks to be comprised of singer-songwriter Ed Sheeran, Jeff Lynne's ELO, John Mayer, Herbie Hancock and DJ Questlove. AC/DC, meanwhile, will team up with loud guitars to simply be AC/DC.

The Grammy Awards airs this Sunday, Feb. 8, on CBS.

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