In the episode, Hall and Oates perform at Grace and James wedding. In season 3 episode 8/9 "Lows in the Mid Eighties," Karen claims that at a party she attended in the eighties she did Jell O shots with Hall and Oates.
James (played by Taye Diggs) takes a dig at Canada, comparing it to Michigan "without any culture". Eric McCormack, who plays Will, was born and raised in Canada.
In the episode Karen (Megan Mullally) calls James (Taye Diggs) "Brown Sugar." Diggs starred in a film titled "Brown Sugar" earlier in his career.