God by John Lennon mentions Elvis, Zimmerman and Beatles
Dig It by The Beatles mentions B.B. King
The Seeker by The Who mentions Bob Dylan and The Beatles
I forget the name now, but I think there's a song which contains "The Beatles latest record is a gas"
Wasn't the a song by The Raspberries in the 70s that mentioned loads of groups. And there was all those Barron Knights 'comedy' songs.
There must be lots of songs that mention 'love', 'yes', 'hello', 'kiss' and 'pink' etc but maybe those don't count as they weren't actually referring to the groups.