It's official: Sean "Diddy" Combs and Cassie are back on. And what better way to celebrate than by throwing a lavish birthday bash?

Last week, TMZ reported that the on-again, off-again couple had called it quits following an argument that brought the cops to Cassie's home. But based on this weekend, it definitely looks like she and the 46-year-old hip hop artist are back on. 

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On Friday evening, Diddy threw his singer girlfriend a 30th birthday party that involved a massive cake, tons of social media posts and plenty of celebrity guests. 

Just ahead of the celebrations, Diddy posted a video montage of Cassie to his Instagram account, alongside the caption: "HAPPY BIRTHDAY BABY! @cassie I LOVE YOU ALWAYS. GOD BLESS YOU." He also took to Instagram to post his Snapchat story documenting the party, which featured appearances from the likes of Naomi Campbell, French Montana and Quincy Taylor. 

Despite the drama that went down last week, the party confirms that the two are still together and very much in love — we guess time (plus an awesome birthday rager) really does heal all wounds.

Follow Chloe Tsang on Twitter @itschloet