Coachella has become one of the most world-famous music festivals for many reasons, one being for the one-off superstar collaborations and performances artists bring to the stages.

With Ariana Grande being the fourth female artist to headline the festival next weekend, anticipation is at an all-time high among fans for what she might bring to the festival but she may or may not have just leaked her very own surprise.

The pop superstar has previously teased that fellow headliner Childish Gambino will join her during her set to perform their 2014 collaboration 'Break Your Heart Right Back', however fans suspect that he won't be the only special guest making an appearance.

Ariana made a number of posts wishing longtime friend and'Sweetener'collaborator Pharrell Williams a happy birthday on her Instgram Stories yesterday, with a Coachella reminder thrown in the middle.

A series of birthday posts for your friend's birthday? Totally normal - expected, even. A 'see you at Coachella'-esque reminder halfway through? That smells like a strong'hint'to us.

If Beyoncé can reunite Destiny's Child for two consecutive weekends and Calvin Harris can convince Rihanna to work when she's lit in the crowd herself, anything is possible.

Some fans are going beyond Pharrell himself and theorising that Pharrell is actually working as the link between Ariana Grande and BLACKPINK,who are also performing at the festival.

"Jennie n Lisa meeting Pharrell, Pharrell produced a Grammy award winning album with Ariana..... Ariana and BLACKPINK gonna be at coachella.... blinkinators are u picking up what i’m putting down," one super-fan tweeted.

Now, we would be pretty confident in putting money down on Pharrell joining Ariana onstage but if BLACKPINK joined her, wigs would'fly'.