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Big Sean, Ariana Grande

Jeff Kravitz/FilmMagic

Big Sean is giving a cute shout-out to girlfriend Ariana Grande!

The rapper took to Instagram today to congratulate his lady on the success of her new album My Everything, which hit stores today.

"Ari's #1 in 80 countries! So great when good things happen to good people. I'm more than proud of you…" Sean wrote along with a pic of Grande's album cover. Too sweet!

Grande and Sean have been heating up since working together on her song "Best Mistake."

Big Sean, Ariana Grande, Instagram

Instagram

"They have been friends since they made the song together," a source told E! News earlier this month. "They have been spending more time together and recently have been getting very close. They are both doing great."

The couple seemingly confirmed their romance Sunday when they were caught on video holding hands backstage at the 2014 MTV Video Music Awards. PDA doesn't lie!