Bands of brothers: A pop legacy

Bros: O'Kelly, Ronald, Rudolph and later Ernie.

Active: 1954 to present

Genre: R&B

Key songs:

"It's Your Thing," "Fight the Power"

Of note: Jimi Hendrix was once their backup guitarist.

Bros: Don and Phil

Active: 1957-73, 1983 to present

Genre: Pop and country

Key songs: "Wake Up Little Susie," "All I Have to Do Is Dream"

Of note: They were among the first class inducted into Rock Hall of Fame.

Bros: Barry, Morris and Robin Gibb

Active: 1967-2003

Genre: Pop and R&B/disco

Key songs: "How Can You Mend a Broken Heart," "Stayin' Alive"

Of note: 1977's "Saturday Night Fever" is the top-selling soundtrack ever.

Bros: Michael, Jermaine, Marlon, Tito, Jackie and later Randy

Active: 1966-90

Genre: R&B and pop

Key songs: "I Want You Back," "Dancing Machine"

Of note: Continued as the Jacksons after Michael's solo success.

Bros: Bill, Brett and Mark

Active: 1973-83

Genre: Pop

Key songs: "So You Are a Star," "Rendezvous"

Of note: Bill is the father of actress Kate Hudson.

Bros: Howard and David

Active: 1968 to present

Genre: Country

Key song: "Let Your Love Flow"

Of note: A Groucho Marx line inspired their Grammy-winning song "If I Said You Had a Beautiful Body, Would You Hold It Against Me."

Bros: Twins Gunnar and Matthew

Active: 1989 to present

Genre: Rock

Key songs: "Love and Affection," "After the Rain"

Of note: Their dad is Rock Hall of Famer Ricky Nelson.

Bros: Cedric and Joel Hailey

Active: 1990 to present

Genre: R&B

Key songs: "How Do U Want It," "All My Life"

Of note: They used to be in the group Jodeci.

Bros: Taylor, Isaac and Zac

Active: 1992 to present

Genre: Pop/rock

Key songs: "MMMBop," "I Will Come to You"

Of note: "MMMBop" was No. 1 in seven countries.