LONDON, England - One of the biggest stars in the world, Taylor Swift, was at Hyde Park for the latest stop on The 1989 World Tour - and the WTA's leading lady, Serena Williams, hit the stage too:
Williams wasn't there alone - BFF Caroline Wozniacki was also there and they tweeted away after:
And Williams and Wozniacki weren't the only WTA stars who turned into Swifties for the night...
Kind of shook it off with Taylor Swift this eve... pic.twitter.com/9jTYerSqwx
? Alize Cornet (@alizecornet) June 27, 2015