Robin Thicke threatened to pull out of a New Year’s Eve appearance at SLS Hotel South Beach because he thought his room was too small.

The “Blurred Lines” crooner was booked to perform and host a party at the Miami hotel and checked in Monday. But we’re told Thicke was dissatisfied with his digs and demanded to be moved.

“He threatened to pull out if he didn’t get a bigger room,” a source said. “His travel agent was calling all over Miami to get him a bigger room at a different hotel.” But a rep for the SLS denied the drama, saying, “Robin has been a great guest.”

Thicke played the Gatsby-themed bash with Skylar Grey.

Go to The Post for more on Thicke's New Year's Eve behavior.