Sibling rivalry, or musical partnership? Who knows when it comes to sisters and brothers. Every answer this week includes the word "brother."

1. Their hits included "China Grove," "What A Fool Believes" and "Long Train Runnin'"
2. Jazz singing group who had a hit with "Glow Worm" in 1952
3. Don and Phil
4. Their 1977 hit was "Strawberry Letter 23"
5. 1985 Dire Straits album that included "Money For Nothing"
6. Don Reid, Harold Reid, Phil Balsey, and Lou DeWitt
7. Barbershop quartet who sang on the Andy Williams Show and later went on to teen stardom
8. Aaron, Art, Charles, and Cyril
9. Dance group who hit with "Cuba" in 1979
10. They sang with Sister Rose
11. They've had hits in the 50s, 60s, 70s, 80s, 90s, and 00s
12. Family Style was their only album-one member died soon after it was recorded
13. Kevin, Joe, and Nick
14. Their hits include "It Began in Afrika" and "Star Guitar."
15. Bill Medley and Bobby Hatfield
16. One-hit wonder group who sang "Time Has Come Today"
17. Their biggest pop hit was "Let Your Love Flow" in 1976

Bonus: Ralph and Carter