Celebrity·Posted on Mar 7, 2013Katy Perry And John Mayer Went Hiking With New BFF Allison WilliamsIt's official, Allison Williams is the new Rihanna to Katy Perry.by Lauren YapalaterBuzzFeed StaffLinkFacebookPinterestTwitterMail Then: Tap to play GIF Tap to play GIF Now: Tap to play GIF Tap to play GIF Photos: MOVI Inc. / Splash News