VIDEO: Tony Winner Steve Kazee Performs 'The F Word' on Last Night's SHAMELESS

Tony Award winner Steve Kazee portrayed Fiona's scorned husband Gus on last night's episode of Showtime's SHAMELESS. During the episode, his character performs his bitter tune, "The F Word" in front of his wife and a dumbfounded bar crowd.

Kazee tells TV Line, "It's a horrible song, and it really makes Fiona feel awful." He jokingly adds that the tune was so catchy that "a lot of people were still singing it [on set] throughout the day."

Below, check out the official lyric video for 'The F Word' written by Chris Stills and performed by Kazee. In addition, check out clips from next week's episode of SHAMELESS airing Sunday at 9pm/ET on Showtime.

Steve Kazee won the Tony Award for Best Performance by an Actor in a Leading Role of a Musical for ONCE. His other Broadway credits include Monty Python's Spamalot as Sir Lancelot, Starbuck opposite Audra McDonald in the Roundabout's 110 in the Shade, To Be or Not to Be at MTC, Edward Albee's Seascape. Regional theater credits include The Subject Was Roses (Kennedy Center, Helen Hayes Award nomination for Best Actor alongside Bill Pullman and Judith Ivey). The actor has appeared Off-Broadway in As You Like It (NYSF).

His TV and film work includes "Working Class" opposite Melissa Peterman, "100 Questions" (NBC), "CSI" (CBS), "NCIS" (CBS), "Numb3rs" (CBS), "Medium" (NBC), "Conviction" (NBC).