Taylor Swift celebrates birthday with concert movie announcement

Taylor Swift is in a giving mood as she celebrates her 26th birthday, offering up a new concert film online.

As the pop star celebrated on Sunday (13Dec15), Apple Music bosses announced plans to release footage from her 28 November (15) 1989 world tour concert in New Zealand.

The film, directed by Jonas Akerlund, will be available on Apple's streaming service from 20 December (15). It will feature never-before-seen footage from backstage and tour rehearsals, as well as the special guests who have joined the pop star during the tour, including Mick Jagger, Justin Timberlake, Selena Gomez and Miranda Lambert, among others.

In a trailer, Swift says, "Getting ready for this I wondered about a lot of things. I wondered what it would be like to perform for 70,000 people. I wondered what would happen if I invited the most amazing artists in the world to come out with me and perform on my stage - would they do it?"

Meanwhile, Swift's 'squad' of celebrity pals took to social media on Sunday to wish the singer a happy birthday.

Selena Gomez posted a photo of the pals together on Instagram and added the caption: "I don't know life without you Taylor. Happy birthday!" while model Gigi Hadid wrote, "What a year, T! Love you, so proud and grateful to call you my friend. You are beyond. Happy Birthday - can't wait to celebrate soooon."

And actress Jaime King also hit Instagram with a special early birthday message and a photo of her pal on Saturday, writing, "Tomorrow is your birthday and I will be in the air. This picture I took of you brings back the fondest of memories. It captures all of your beauty that I know, that the world knows, in one photograph. You have the uncanny ability to just get straight into the Soul's of us all in one shot. With your music, you grab the hearts of countless hearts & don't let go."

"As my sister, with your irresistible enthusiasm, un-f**king unbeatable passion and true honesty, feels like home," King added. "To have changed the perception of female friendships (even in the smallest way) because somehow, in this crazy world where women want to hurt each other, we have a thoughtful group of friends where we have chosen to love each other through it all, and support our peers along the way & with open arms you bring this sisterhood to life Intimately and sincerely.

"I love you, I am profoundly proud of you, your Light is a rare and brilliant gift. Happy Birthday!!!"

King recently called on Swift to be her son Leo's godmother.

Taylor jetted back to Los Angeles early on Sunday, after wrapping the final show of her seven-month 1989 tour in Melbourne, Australia on Saturday (12Dec15).

Celebrating her birthday, she posted a photo of herself as a child with the caption: "Today I begin my 26th year of freaking out over stuff."