1974: Elton John was joined on stage by John Lennon at Elton's Madison Square Garden concert. They performed three numbers together, "Whatever Gets You Through the Night", "Lucy in the Sky With Diamonds" and "I Saw Her Standing There". Lennon had promised the flamboyant rocker that he would make a stage appearance with him if his "Whatever Gets You Through the Night" became a #1 hit, which it did two weeks earlier. Later that same night, Lennon and his estranged wife Yoko Ono reconciled backstage after being separated for a year.
1989: Stevie Wonder joins Paul McCartney on stage at Paul's Los Angeles concert to sing their 1982 duet, "Ebony and Ivory".
2012: Rod Stewart scored his first number one on the Billboard Adult Contemporary chart since "Have I Told You Lately" in 1993 when his rendition of "Let It Snow, Let It Snow, Let It Snow" rose to the top.
1957: Gene Vincent And The Blue Caps appear on The Ed Sullivan Show for their first national TV appearance. They perform "Lotta Lovin'" and "Dance to the Bop".