Russ has already had a busy October, but his newest single might be his "Best." At least, according to Rihanna.

His new single "Best on Earth," a collaboration with BIA, arrived over the weekend, and it didn't take long to catch RiRi's attention, as the singer took to social media on Friday to thank Russ and BIA for the new track, calling it "my new fav song."

That high praise from the queen comes as Columbia Records has also confirmed "Best" has racked up a quick 4 million streams across digital platforms. It follows Russ' other previous releases "Grammy Bag Freestyle" and "Old Days."

Hear "Best on Earth" below.