Taylor Swift, Capital Summertime Ball 2013 [VIDEOS]: Harry Styles' Ex-Girlfriend Performs Hit Songs Including Surprise Duet with Ed Sheeran

Taylor Swift performed her hits "I Knew You Were Trouble" and "22" at the 2013 Capital Summertime Ball at London's Wembley Stadium this weekend. She even surprised fans with a surprise duet performance of "Everything Has Changed" with "Red Tour" opener Ed Sheeran. The 23-year-old pop star blew the audience away with her performances as well as her sexy style. Swift showed off her long legs in short shorts while dancing around the stage during her performances. Before the Summertime Ball, the songstress did a quick on-air interview discussing her current tour and the songs she planned on performing during the concert.

Check out some live footage of a few of her performances from this year’s Summertime Ball right here:

Swift recently revealed to USA Today that she has started the writing process for her new record.

"All the anxiety is starting," she admitted. "When the anxiety starts, the writing happens right after, usually."

Though we should be excited for her new record, the writing process itself might take some time. You might want to start getting your hopes up in about a year or two considering the way Taylor described her writing process.

"Whatever I write in the first year is going to get thrown away," she explained. "I'm going to like it, but it's going to sound like the last record. The second year usually sounds like the next project."

Plus, according to Taylor, we might be seeing some surprises with this new record.

"I think you need to change up your influences. I think you need to be inspired by different things than you were inspired by before," she said.