Taylor Swift is a bridesmaid at best friend's wedding

Taylor Swift was seen at her best friend Abigail Anderson's wedding on Saturday. That's the same Abigail who she went to high school with and the 2009 hit, Fifteen, about.

The 27-year-old looked stunning in a halter maroon gown with an A-line bottom as she tended to her pretty blonde friend at the splashy nuptials in Martha's Vineyard, a Massachusetts island that sits in the Atlantic Ocean just south of Cape Cod.

The pop star - who just released her revenge song Look What You Made Me Do earlier this week - seemed to keep her head down as she stayed behind the bride while they walked into a church. 

Fulfilling her duties: On Saturday, Taylor Swift, 27, was an attentive bridesmaid to Abigail at her wedding in Martha's Vineyard

Taylor wore her medium-length blonde hair down and in soft curls. She also had long bangs. 

The Shake It Off singer went for a bold, wine-colored lip to match her floor-length dress and had on flattering dark eye makeup.

The Pennsylvania native kept her accessories to a minimum, choosing only a simple silver pendant.

Ready for fall: The singer looked extravagant in a halter maroon gown with an A-line bottom

Her friend looked like a lovely bride in an off-white and light pink gown.

The top part was lace with a sweetheart neckline and no straps. The bottom had plenty of tulle and flared out.

A long cream colored veil with lace flowers looked delicate over her blonde updo and she held onto a bouquet with light pink and maroon flowers. 

Gorgeous! Abigail's dress was a cream color, drop waist gown with a full skirt

Beautiful selection: Both bride and bridesmaid carried a bouquet full of pink, maroon and white flowers

Here comes the bride (with the world's biggest pop star behind her): The top part was lace with a sweetheart neckline and no straps. The bottom had plenty of tulle

Also at the nuptials was Taylor's mother Andrea who was elegant in black.

This sighting comes after the Nashville favorite made waves when she released her song and music video for Look What You Made Me Do.

There was a much darker, edgier feeling to the new release with Swift in black and looking angry as she supposedly took jabs at Katy Perry, Kanye West, Kim Kardashian and Tom Hiddleston.

Wedding look: Abigail wore her naturally curly hair up in a chic, elegant updo

Careful: Taylor let her pal shine on her big day as she carefully protected the bottom of her dress from dragging on the floor

Supportive: Taylor's mother Andrea also came out

At one point Taylor was seen dressed up as Katy with her hair appearing to be cropped short. She also had on leopard print and was with a cheetah.

Perry has talked about her love for cats.

The Perry character is seen getting in a nasty car accident as paparazzi take her photo.

There was also a jab at Kim as Taylor laid in a bathtub full of diamond jewels. Swift talked about her enemy's perfect crime as she bit into the gems.

The songbird was most likely alluding to Kim's jewel robbery in Paris in October.

The song has been on the top of the charts ever since it debuted last week.

It is just one song off her Reputation album which will be released on November 10.

Also on Saturday it was revealed the Bad Blood singer has a very big heart.

She did her part in helping the victims of Hurricane Harvey that has hit Texas and Louisiana.

She's generous: Also on Saturday it was revealed the Bad Blood singer has a very big heart. She did her part in helping the victims of Hurricane Harvey that has hit Texas and Louisiana

Sweet: The former country singer made a sizable donation to Houston Food Bank in honor of her mother, Andrea, who attended University of Houston. 'We thank you, Taylor, and we thank everyone for donating to help rebuild our community,' the Houston Food Bank wrote in a statement on Facebook

The former country singer made a sizable donation to Houston Food Bank in honor of her mother, Andrea, who attended University of Houston.

'We thank you, Taylor, and we thank everyone for donating to help rebuild our community,' the Houston Food Bank wrote in a statement on Facebook.

Her foe Kim Kardashian and her family have donated $500,000 to causes.

It is not known what Perry, who has released the Swift revenge song Swish Swish, has donated. 

Bring it on in Balmain like Taylor

Oh look what you made Taylor do! She's back with vengeance. She spans several key looks in her new video. There's kinky latex Taylor, sports luxe Taylor in her Gucci hoodie and then classic Kween Taylor in a Balmain wrap dress.

This red wrap dress commands attention with it's sheer inserts and open shoulders. The wrap style shows off her long legs as well.

Sadly this exact one is no longer for sale but check out more from the powerhouse designer, Balmain at Neiman Marcus.

If you're seeing red like Taylor, then check out our edit below of killer wrap dresses.