It's pretty hard to miss Lea Michele as Glee shoots on location in NYC today. The Triple Threat's 70s-inspired look seems to be an homage to Marlo Thomas' sitcom That Girl or the actress is reenacting the opening credits to the Mary Tyler Moore Show — will Chris Colfer be playing Rhoda?! Either way, with hype building from Cory Monteith's tweet: “...the New York mashup we are doing today will probably make your head explode," we can't help but imagine a pairing of "Love Is All Around" and Weezer's "Buddy Holly" — or will it be "That Girl" and Madonna's "Who's That Girl?"

http://idolator.com/5835702/lea-michele-chris-colfer-glee-nyc-photos/lea-michele-nyc

http://cdn.idolator.com/wp-content/uploads/2011/04/lea-michele-nyc-500x864.jpg

http://2.bp.blogspot.com/_lAAb2fW9PbA/SA1Hf_eflSI/AAAAAAAAA2k/W097TFvlAl4/s400/Mary%2BRichards%2BHat%2BToss%2B2-1.jpg

I would say they're paying homage to That Girl, not TMTMS. First of all, that outfit is totally 1960s. Second, the colors of the outfit look like the That Girl DVD covers. And third, that white hat is the real giveaway.
http://www.youtube.com/watch?v=kurwEQDi0Ms&feature=related
I wish I could say it was TMTMS because I don't particularly like That Girl.