Taylor Swift: I love being in Haim’s wolf pack

Taylor Swift says life has never been the same since becoming friends with Haim.

The 25-year-old singer has a close friendship with the American group, formed of sisters Este, Alana and Danielle Haim.

And on Saturday, Taylor posted a cute Instagram video as she paid tribute to Este on her birthday.

In the footage, Taylor is seen belting out Faith Hill song This Kiss. She captioned the video: "Sisterhood".

In another message, Taylor wrote on Twitter: "Happy Birthday, Este!! Ever since you, Alana, and Danielle adopted me into your wolf pack, life has never been the same. @haimtheband."

It seems Taylor and the trio are more like sisters than just friends, with the singer concluding her touching birthday message for Este by tweeting: "Real friends are the ones who walk into your house and go get snacks out of the pantry without asking. Happy Birthday, Este! @jizziemcguire."

Since becoming friends, Taylor and Haim have been keeping their fans updated with regular postings on social media.

The pals frequently enjoy girls' nights in together, and even recently went on holiday to Maui, Hawaii.

And their fun will be continuing later this year, with Taylor revealing Haim will provide the support for certain dates on her upcoming 1989 world tour.

Announcing the news, Taylor tweeted: "The girls and I got to talking and I'm overjoyed to announce that @haimtheband will be joining The 1989 World Tour!! TOURING W/ SQUAD YESSSS

"So excited we get to hop on the 1989 tour with @taylorswift13 and play a few of our favorite cities!" Haim added.