Backup band

[1] The situation may be a live performance or in a recording session, and the group may or may not have its own name, such as "The Heartbreakers" (the band of Tom Petty), or "Bob Wills and his Texas Playboys" in the 1930s.

[2] Often, backup bands contain sidemen who are skilled but not known to the public; these musicians may be replaced or substituted at any time without noticeable impact on the performance.

[3] A number of cohesive stand-alone groups of musicians have emerged from the shadow of the starring celebrity (whom they are backing) to achieve a stature of their own.

An example is the Eagles in 1971, emerging from being the backing band for Linda Ronstadt.

[1] Notable backing bands (with lead artist) include:

Bob Dylan and the Band performing in Chicago in 1974