Five years ago, Calvin Harris was chatting with an Australian radio DJ, and was shocked to discover that same-sex marriage was still illegal Down Under. At the time, the DJ enticed Harris to make a deal: when Australia finally legalized gay marriage, Harris would celebrate the occasion by delivering a new remix of the Spice Girls’ hit “2 Become 1”.

As Time reports, Harris agreed, and shook hands with the DJ, Filip Odzak, to seal the deal.

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On Friday, Australia’s prime minister signed a bill that will make same-sex marriage legal, as of Saturday, Dec. 9, and Odzak has a question for Harris: where’s the remix?

Odzak tweeted a text message he sent to Harris reminding him of their deal, “sealed with a handshake.”

“For five years I’ve been waiting to hear this!” wrote Odzak to Harris. “I’m very excited to hear what you do with the iconic track to celebrate this momentous occasion. A deal is a deal!”

Odzak’s tweet quickly went viral, liked more than 12,000 times and retweeted over 3,800 times.

While Harris hasn’t commented on Odzak’s text message — and didn’t respond to Time‘s request for comment — the DJ spoke with Time, recalling how the whole thing came about.

“I honestly can’t remember what turned the conversation to the topic of wedding songs, but I chimed in and said mine would be Spice Girls’ ‘2 Become 1,’” said Odzak.

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“Everyone in the convo giggled, but Calvin was shocked when we told him that gay marriage wasn’t a reality in Australia yet. I vividly remember his face when he said ‘No way, I totally thought it was?’ He was in genuine shock,” added Odzak.

“He 100 per cent would have thought it was a laugh, and, let’s be honest, he probably gets millions of requests like this,” noted the DJ. “But he shook my hand on the deal. I haven’t forgotten it to this day, and been waiting for equality in Australia to follow him up on the deal!”

The Twitterverse agrees wholeheartedly with Odzak, sending a loud-and-clear message to Harris: get mixing!