In 1995, "You Oughta Know" introduced the world to a then-unknown Canadian angstress named Alanis Morrisette, who was very, very mad at one of her exes and wasn't afraid to shout about it. And at Sunday night's (January 31) Grammy Awards, Beyoncé worked the song into her performance of "If I Were a Boy."

Co-written by Morissette and producer Glen Ballard, featuring guitar and bass from Dave Navarro and Flea (both of whom were in the Red Hot Chili Peppers at the time), the song came out of nowhere in the summer of '95, shooting straight to the top of the Billboard Modern Rock chart and powering sales of Morissette's Jagged Little Pill to sales of more than 33 million copies.

In the process, it also turned the 21-year old Morissette — who, before the song, was perhaps best known for a stint on the Canadian kids' show "You Can't Do That on Television" — into a rather unwilling spokesperson for jilted girlfriends everywhere. It also brought speculation about her love life (rumors persist to this day that the song is about former boyfriend/ "Full House" star Dave Coulier). Though Morissette has never revealed who the subject of her spite was, in 2008, Coulier said the song was about their rocky relationship.

At the 1996 Grammy Awards, "You Oughta Know" won Morissette two trophies — Best Female Rock Vocal Performance and Best Rock Song — and Pill took home two more, for Best Rock Album and Album of the Year.

Morissette would reimagine the song several times, including on her 2005 album Jagged Little Pill Acoustic, and though the music may have been toned down a tad, the acrimony of the lyrics ("It was a slap in the face/ How quickly I was replaced/ And are you think of me when you f--- her?) remained. Since its release, "You Oughta Know" has also been covered by the likes of Britney Spears, and Beyoncé made it a part of her "I Am ... " world tour in 2009 and her Grammy performance Sunday.

The 2010 Grammy Awards may be over, but MTV News will have much, much more from the show, including reports on your favorite nominees, party photos, behind-the-scenes video and much more from the big show!