Many of the guitars are "quirky and irreplaceable with sentimental value," according to the studio's co-owner.

Cher, pictured here at age 19 in this 1966 photo, is seen posing next to Bono outside of their Los Angeles home. The pair initially met at a coffee shop and later moved in with each other—with Cher as ...

Then came what was perhaps the biggest surprise: Violet Grohl, Dave’s 18-year-old daughter, singing lead vocals on Nirvana’s ...