A lucky couple saw Taylor Swift at their wedding without invitation and had to pay nothing at all to get the pop superstar perform her award winning song at their wedding ceremony in New Jersey over the weekend.

Swift, who recently broke up from boyfriend, Calvin Harris, made herself the ultimate maid of honor with her childhood best friend, Britany Maack's wedding by surprising a couple on their big day with a performance and a handmade gift on Saturday, June 4.

The bride and groom, Kenya Smith and Max Singer, were originally married in a ceremony at the hospital where Singer’s late mother was battling terminal cancer. The couple wanted to be sure she would be able to witness the momentous occasion, and Singer even had a mother-and-son dance to Swift’s hit 'Blank Space.'

ALSO READ:4 types of wedding crashers and ways to deal with them

Then, in April, Singer’s sister Ali reached out to Swift about performing at her brother’s larger, family nuptials at the Brant Beach Yacht Club in New Jersey—and yes, Taylor showed up unannounced.

She surprised the crowd with a stripped-down performance of 'Blank Space' and then posed for selfies with guests and photos with the couple.

ALSO READ:President Obama crashes couple's wedding ceremony, gives groom marriage advice [PHOTOS]