Taylor Swift had a busy couple of shows across the pond in London. On Saturday (Feb. 1), the singer dealt with an errant fan bum-rushing the stage at the O2 Arena before being addressed by security. She had her BFF Ed Sheeran perform with her for a song, and she also extended the invite to up-and-comer Sam Smith the next night.

At around the 17-second mark of the video above, Swift's stage is stormed by the fan, who ran up the steps from the crowd to the main stage and then up the ramp to T. Swizzle, who was performing 'We Are Never Ever Getting Back Together.' He handed her a note before he was promptly escorted by security. We are shocked he made it that far, honestly.

Before the fan made his way to the stage, she had treated her Swifties to a guest appearance by local boy done good Sheeran.

Wearing a sparkly Union Jack t-shirt, she said she loves her London fans and that one of her best friends lives there. Of course she invited her pal and former tourmate to the stage for their rendition of his 'Lego House.'

Swift said the minute she heard Sheeran's music, she knew she wanted to work with him. Now, he was kind enough to show up on a day off, which lead to tons of screams.

At the following day's (Feb. 2) show at the O2, she invited Smith, an up and comer, to join her. They performed his song 'Money on My Mind.' Get to know Sam Smith below, since he got a huge endorsement from T. Swizz.

Watch Taylor Swift Perform 'Lego House' With Ed Sheeran

Watch Taylor Swift Perform 'Money on My Mind' With Sam Smith