Watch T.R. serenade Katherine Heigl on Oprah

On Friday Brian post about T.R. Knight appearing on Oprah as a surprise guest for his BFF Katherine Heigl. Now we've got the clip of T.R. serenading Katherine as he sings about beating her at Monopoly, how they're just like Oprah and Gayle, and even jokes about whether he can get married some day. And I especially love that last part.

There is no reason for a gay celebrity to be "gay, gay, gay" all the time, but I do appreciate out stars — like John Barrowman — who treat their sexuality as something perfectly normal that does come up in day-to-day conversation as opposed to those who come out once and barely ever speak of it again.

Check out the clip after the jump!