You wouldn't gatecrash someone's private wedding to catch a glimpse of a bridesmaid - at least, we hope you wouldn't - but the presence of Taylor Swift at her pal's Saturday nuptials was apparently enough to draw a vocal crowd.
Meanwhile, the bride herself also looked incredible; she opted for a nude coloured strapless dress with a fitted bodies that had loads of embroidery and lace on it.
That's what best friends are for.
The "I Don't Wanna Live Forever" songstress and Anderson, who married her photographer beau Matt Lucier, have known each other since they were young, and she was the subject of the singer's track "Fifteen", off her 2008 albumFearless.
Anderson posted photos from her bridal shower in early August in Cabo San Lucas, Mexico, sans Swift, but it's possible she still attended and just opted not to take pictures.
Wearing a burgundy-colored floor-length gown, Taylor was spotted lifting up the back of the voluminous gown as her friend walked into the church. However, when the wedding was over, Taylor seemingly tried to duck out without greeting an awaiting legion of fans who had set up camp outside the wedding venue. This friendship really is one for the ages!