Natalie Imbruglia is probably still lying naked on the floor, but this time it’s out of sheer humiliation after hearing Megan Mullally and Casey Wilson sing “Torn” in a teaser for tonight’s episode of Happy Endings. Mullally stops by as Dana, one half of Two Hartz Beat As One, the mother-daughter singing group that Penny was a part of growing up, as well as the likely root of all of her personal issues. “I have to say that I feel like Casey and I work together really, really well,” Mullally said of her guest spot. “I think the whole cast is great, and it’s been super fun – I feel like it’s been one of the funniest things I’ve done in a while.” Says Wilson, “‘I say we’re like the Gilmore Girls, but we’re better because we came first,” as well as having 99% more tap routines.