Taylor Swift<\/strong> just gave Prince William<\/strong> the birthday gift most tween girls can only dream of. The Prince of Wales, who turned 42 Friday<\/a>, spent his birthday evening with Swift and 90,000 or so other people, all of whom were at Wembley Stadium for the first in three London stops for Swift\u2019s Eras Tour. And unlike the concert-going behavior of his brother, Prince Harry<\/strong>, William wasn\u2019t above shaking a tail feather at the show.<\/p>\n The royal family staked its Taylor Swift claim even before the lights went down at Wembley. During Friday\u2019s ceremonial Changing of the Guard at Buckingham Palace, passers-by were treated to a far less traditional tune: Swift\u2019s \u201cShake It Off,\u201d played by the palace troops. Via X<\/a>( formerly Twitter), the royal family tweeted a video of the performance, saying, \u201cCan\u2019t stop, won\u2019t stop groovin\u2019\u201d (For the uninitiated, that\u2019s a lyric in the nearly 10-year-old lead single from Swift\u2019s album, 1989<\/em>.) \u201cChanging of the Guard (Taylor\u2019s Version),\u201d the video was captioned.<\/p>\n