1. Taylor Swift and Nicki Minaj

Taylor Swift and Nicki Minaj

I mean, come on. If now's the time to bank on celebrity feuds, this takes the cake: The VMAs stunned audiences this year by bringing together Nicki Minaj and Taylor Swift in their opening performance. Joining Minaj during her second number, The Night Is Still Young, the singer looked at home in her glitzy tribal gear. They ended their performance with a snippet of Bad Blood, proving that in the spirit of entertainment, Twitter tiffs do take a backseat. 

2. Taylor Swift and Lisa Kudrow

Taylor Swift and Lisa Kudrow

Smelly cat, smelly cat, what are they feeding you? A side of Tay Tay and Pheebs, perhaps. At the Los Angeles leg of her 1989 World Tour, Swift invited Lisa Kudrow on stage to perform Smelly Cat, the Central Perk favourite that fans of Friends love to chant — it's not so much a song as an anthem for struggling, hippie musicians. 

3. Taylor Swift with St. Vincent and Beck

Beck and St. Vincent       

The squad goals are strong with this one. It's no surprise that St. Vincent's one of the invitees — she's the alleged squeeze of Cara Delevingne, who's also part of the Swift force. Swift went full indie with Beck and St. Vincent, singing the earlier's new song Dreams. Providing backing vocals while St. Vincent worked on the power chord riff, the guests were sure to draw new followers to Swift's growing fanbase. 

4. Taylor Swift and Alanis Morissette

Alanis and Taylor

They're both the Aunt Agonys of their respective generations. Jagged Little Pill turns 20 this year, which seems timely for Alanis Morissette to perform You Oughta Know, one of the singles off that record. Swift played the hype man during Morissette's cameo performance, which was a gripping look at the younger artist's future — 20 years on, we'll probably see Swift returning the favour to a younger, equally angrier popstar.

5. Taylor Swift and Avril Lavigne

Avril Lavigne and Taylor

Swift finally met Avril Lavigne at her San Diego show, where Lavigne was invited on stage to perform Complicated. If you were a preteen or teenager growing up in the early 2000s, this was the anthem for your own coming-of-age story, when ties worn with tees were a thing, and when the sight of skater boys still made you sigh. Swift too, remains a fan of Lavigne's angsty pop hits, and sang her praises quite literally by performing together onstage.

And just for good measure, Taylor Swift and Ellen DeGeneres

Ellen Degeneres

Sure, the talk show host can't sing a tune to save her life, but she does rock a tutu and dress even sparklier than the popstar. Shine on, Swifty.