Karaoke Revolution Volume 2 shipped today. It's interesting to observe this passage from my review of the original game:

The inbuilt capacity for expansion discs could repair this installment's notable omission of Frank Sinatra and Jimmy Buffett, Elvis Presley and the Beatles, Kenny Rogers and Garth Brooks, and Gloria Gaynor and the Village People.

With the sequel's inclusion of I've Got You Under My Skin, Heartbreak Hotel, Friends in Low Places, and I Will Survive, each of the four pairs of singers I listed has now been covered.