Calvin Harris & Nicole Scherzinger: We Went As Far As We Felt Like Going

Calvin Harris' rebound game is strong ... wrangling a doll like Nicole Scherzinger ... or so it appears.

The superstar DJ and former Pussycat Doll partied together over the weekend at Tape nightclub in London. Our Calvin sources tell TMZ he bumped into her there and later offered to give Nicole and her girls a ride home (smooth!) ... which they accepted.

So much for Calvin declaring he's done dating celebrities.