Frank Sinatra
Both very famous, but I think Frank Sinatra is slightly more famous.
Frank Sinatra, definitely
Frank Sinatra is undoubtedly more famous than Iron Maiden.
Sonic
I think generally speaking, Frank Sinatra is more famous than James Hetfield (the lead singer of Metallica). Metallica would never be as widely embraced by the masses as Sinatra is.
Frank Sinatra
Lady Gaga
Frank Sinatra
Frank Sinatra
Frank Sinatra
Frank Sinatra