Things on FOX's hit show, "Glee," got pretty "Mean" last night (May 15). The tune, which earned Taylor Swift a No. 2 song last year, was sung by Puck (played by Mark Salling) and Coach Shannon Beiste (Dot-Marie Jones) during the episode entitled, "Nationals." (Watch below.)

"This song is really close to my heart," Taylor has said. "It's a song that I wrote on a really, really bad day, but it has produced so many happy days for me since."

Among those "happy days" were the 2012 Grammy Awards, where she took home the Best Country Solo Performance and Best Country Song trophies for the track.

The season 3 finale of "Glee" airs this Tuesday, May 22, at 9:00 PM ET.

Watch the 'Glee' Characters Sing 'Mean'

Watch Taylor Swift's 'Mean' Video