UnScramble this Word: b l g e i e l i?

Questions

Pop Rock: He sang "Sitting on the Dock of the Bay"?

Pop Rock: His first hit was "Born to Run"?

Pop Rock: His nickname is derived from his first hit song, "The Fat Man"?

Pop Rock: Jimmy Page, Jeff Beck and Eric Clapton have all belonged to this band?

Pop Rock: My Boyfriend's Back, by this group, was inspired by overhearing a teen argument?