Robin Thicke gave an impromptu birthday serenade to Scott Sartiano at his birthday dinner at The Darby, which Sartiano owns with partner Richie Akiva. While Gisele Bundchen, Lukas Haas and Sartiano's fiancée, Allie Rizzo, looked on,Thicke sang a rendition of Al Green's "Let's Stay Together."Our spy reports guests went "hysterical" when Robin sang the line, 'I want to spend my life with you,' to Sartiano. The group then migrated to 1Oak, where Gerard Butler and Giuseppe Cipriani dropped in.

Read more: http://www.nypost.com/p/pagesix/robin_thicke_gives_scott_sartiano_3TWwsmoPXtYO0B2xCOxEkK#ixzz13whTXWFk