Could this be Taylor Swift's best girl squad yet? After her win with tech giant Apple and earning the title of highest-earning celebrity couple with boyfriend Calvin Harris, Swift wrapped up her successful week with an epic performance in London as part of her 1989 World Tour. Of course, it wouldn't be a celebration without her squad there, too. The singer brought out her biggest group of girlfriends yet as she performed her often-star-studded song, "Style," including Martha Hunt, Kendall Jenner, Serena Williams, Taylor Swift, Karlie Kloss, Gigi Hadid and Cara Delevingne. So have you met the whole squad? Let's take a closer look at Taylor Swift's leading ladies.

Martha Hunt

We've seen Karlie and Kendall report for BFF duties for a while now, but who is Martha Hunt? One of Tay's newest recruits, Hunt is an IMG model who has walked for designers like Chanel, Oscar de la Renta, Giorgio Armani, but you would probably know Hunt best for her work with Victoria's Secret.

KENDALL JENNER

Now an American fashion model and designer muse, Kendall Jenner first came to our attention while appearing in the E! reality television show Keeping Up With The Kardashians. While there have been rumours of bad blood between the pair, they were quickly demolished when Kendall appeared on stage during Swift's London performance. Another PR masterstroke for Tay!

Serena Williams

Ranked No. 1 in women's singles tennis, Serena Williams is an American professional tennis player. The champion took some time off from her Wimbledon preparations to join Swift and her model friends on stage at Hyde Park.

KARLIE KLOSS

Swift and Karlie Kloss first met at the 2013 Victoria's Secret Fashion Show, where Kloss walked the runway and Swift performed with Fall Out Boy. Fast forward two years and the pair have forged the kind of friendship that all young girls dream about. From road trips and shopping excursions to simply cooking dinner together at home, these ladies are the perfect poster girls for what BFF material entails.

GIGI HADID

Jelena Noura Hadid, commonly known as Gigi, is an American fashion model who has appeared in magazines such as Elle, Grazia, Cleo and Vogue. She was also named one of 12 rookies in Sports Illustrated's annual swimsuit issue in 2014.

CARA DELEVINGNE

Last but certainly not least, Cara Delevingne- Queen of the Power Brow- is an English fashion model, actress, singer and designer muse. Not only have Tay and Cara shared the limelight on the Victoria's Secret stage, the pair have also shared a boyfriend- One Direction hottie, Harry Styles.