What is Avril Lavigne's best release (single)?
"Complicated" (2002)
"Sk8er Boi" (2002)
"I'm with You" (2002)
"Losing Grip" (2003)
"Don't Tell Me" (2004)
"My Happy Ending" (2004)
"Nobody's Home" (2004)
"He Wasn't" (2005)
"Keep Holding On" (2006)
"Girlfriend" (2007)
"When You're Gone" (2007)
"Hot" (2007)
"The Best Damn Thing" (2008)
"Alice" (2010)
"What the Hell" (2011)
"Smile" (2011)
"Wish You Were Here" (2011)
If I remember correctly last year it was voted her best song by her fans, and was added to the tour set-list due to high demand. That doesn't sound like underrated to me.