Dianna Agron Turns 26! Relive Her Best ‘Glee’ Performances (VIDEOS)

Dianna Covers Cosmo!
Dianna Agron explains why she keeps quiet.
Dianna Wheels Around
Dianna Agron in a wheelchair on set of 'Glee.'
Dianna's Pink 'Do!
Dianna Agron dyes her hair for 'Glee.'
Glee’s Dianna Agron may portray 17-year-old Quinn Fabray onscreen, but off screen the young starlet is celebrating her 26th birthday!

Over the course of three seasons of the hit TV musical, Agron has won our hearts with countless magical performances. She’s gone from head Cheerios cheerleader to pink-haired rebel to aspiring Yale graduate. She first made her singing debut in season one’s episode called “Showmance” with a rendition of Dionne Warwick’s “Say a Little Prayer.” Since then, she’s covered some of music’s biggest songs.

To celebrate her b-day, Celebuzz has put together our list of her top five performances, plus one honorable mention. Take a look at our picks:

#5: “Papa Don’t Preach” by Madonna

#4. “Never Can Say Goodbye” by The Jackson 5

#3. “Lucky” by Jason Mraz and Colbie Caillat

#2. Mashup of “I Feel Pretty” from West Side Story and TLC’s “Unpretty”

#1. “It’s a Man’s, Man’s, Man’s World” by James Brown

Note: Disregard the Spanish dubbing over the dialogue and subtitles.

Honorable Mention: Check out her performance — alongside The Glee Project season one winner Samuel Larsen– of “Saving All My Love for You” by Whitney Houston in the embed above.

Sit back, enjoy the music, and leave your best b-day wishes to our favorite Glee gal in the comments!