Barry Sternlicht, founder, chairman and CEO of Starwood Capital Group, has invested an undisclosed amount in HotelTonight, maker of an app to help users with last-minute hotel bookings. As part of the funding, Sternlicht has joined HotelTonight as a strategic advisor. In less than three years, San Francisco-based HotelTonight has raised more than $80 million in funding from Battery Ventures, Accel Partners, U.S. Venture Partners, Coatue Management. GGV Capital and First Round Capital. It’s most recent round was a $45 million Series D in September, which it raised as part of its push to expand overseas. More info on Sternlicht’s personal investment is available here from Vator.TV.