Hey La, Hey La, My Ex-Boyfriend's Back is the 16th episode of the second season and the 38th overall.
- Eric McCormack (Will Truman)
- Debra Messing (Grace Adler)
- Sean Hayes (Jack McFarland)
- Megan Mullally (Karen Walker)
- This episode marks the only appearance of Michael, Will's ex.
- This episode is named for The Angels song, "Hey La, Hey La, My Boyfriend's Back" which Will and Jack perform together when they believe Michael wants to rekindle his relationship with Will.
So… I've come to a decision. I'm going to decorate Michael's place. I mean, he's gay, how hard could it be? Chrome, black leather, a shower for six. Done! — Karen