Biggest Fan may refer to:
- The Biggest Fan, a 2002 film by Michael Criscione and Michael Meyer starring Chris Trousdale from the boy band Dream Street
- "Biggest Fan", a 2012 song by American hard rock band Call Me No One
- "Biggest Fan", a 2012 song by American singer Chris Brown from his fifth studio album Fortune
- Your Biggest Fan, a 2006 EP by indie pop band Voxtrot
- "Your Biggest Fan", a 2010 song by American singer Nick Jonas featuring China Anne McClain