Calm down, KatyCats: Katy Perry is not pregnant, nor is she planning a wedding. OK Magazine tweeted a retraction for having “wrongly stated that Katy Perry was pregnant & that she was planning a wedding” in their March 2 print edition. Katy retweeted the magazine’s retraction as well as their apology to her “for publishing the error.”Speaking of brides-to-be, though, there is one woman gearing up to walk down the aisle who Katy says changed her life: Allison Williams! In a feature for Glamour.com, Katy named the Girls star, who’s engaged to John Mayer’s longtime pal Ricky Van Veen, as one of the 10 women who changed her life. Perry said, “Allison was born for this business. Even her effortless airport style would take me four hours to replicate. I can’t wait to see her established as a household name in all things TV and film—especially because she’s such a good human.”