Look who swung by the Gossip Girl set today to film a surprise guest starring role — none other than GG's most punk rock ex-pat, Taylor Momsen. OK! GALLERY: FRIENDLY EXES PENN BADGLEY AND BLAKE LIVELY BOND ON THE GOSSIP GIRL SET IN NYC Taylor is clearly reprising the role of Jenny Humphrey but nothing is known as to how long Jenny will return nor what the character's story arc might be. Taylor was given the boot from the series in 2010 and has since made devoted all her energy to her band, The Pretty Reckless. Read More >>