1. Parliament, Funkadelic: Both were led by George Clinton
2. Ronnie Milsap, Stevie Wonder: Both are blind
3. Gloria Estefan, Jon Secada: Both were born in Cuba
4. Kansas, Electric Light Orchestra: Both used violins
5. Toni Basil, Paula Abdul: Both were dancers and choreographers as well as singers
6. Tavares, The Osmonds: Both were brother acts
7. Peter Wolf, Mark Lindsay: Both were the lead singers of bands named for another group member (J. Geils and Paul Revere)
8. Tina Turner, Aerosmith: Both made comebacks in the '80s
9. Sly and the Family Stone, The Doobie Brothers: Both were interracial bands
10. Curtis Mayfield, Chaka Khan: Both were born in Chicago
11. Ron Wood, Jeff Beck: Both worked with Rod Stewart
12. GQ, Harper's Bizarre: Both were named for magazines
13. The Bee Gees, The Proclaimers: Both include sets of twin brothers
14. Otis Redding, Ricky Nelson: Both were killed in plane crashes
15. Kiss, Village People: Both were as well known for their appearances as their music
16. Bill Wyman, Andy Summers: Both were considerably older than the rest of their bandmates
17. Van Halen, Santana: Both use the last name of their guitarist as the band name

Bonus: Garth Brooks, David Bowie: Both have recorded albums under an alter-ego (Chris Gaines and Ziggy Stardust)