Here's what's being talked about today in pop culture:
• Jimmy Fallon's first night hosting "The Tonight Show" went well, with an all-star sketch that brought out Robert De Niro, Rudy Giuliani, Tina Fey, Seth Rogen and rival Stephen Colbert and Joan Rivers, ending a 27-year exile from "Tonight" that goes back to her acrimonious split from Johnny Carson. [The Huffington Post, The Hollywood Reporter]
• Members of the Russian punk collective Pussy Riot were detained in Sochi, site of the 2014 Winter Olympics, and later released. [BBC]
• First images of Marvel's "Guardians of the Galaxy" are out, and the first teaser trailer comes out today so the hype machine continues to roll for a title most nonfans couldn't care less about. [IndieWire]