Jay Z joined Rihanna's fans to welcome the Umbrella singer back to her adopted New York after a seven-day round-the-world trek at the 777 Tour finale on Tuesday night (20Nov12).

The R&B star ended the whistle-stop trip with a high-profile performance at New York City's Webster Hall - and her mentor was in the audience for the homecoming.

The rapper did not take the stage with Rihanna for their collaborations Run This Town and Umbrella, but he beamed with delight from the shadows as the hard-working star ended her tour on a high note.

He's not the only celebrity who has popped up at Rihanna's 777 Tour shows - model-turned-actress Brooklyn Decker, who co-starred with Rihanna in Battleship, took in her pal's Toronto, Canada show last week (ends16Nov12) and Sean 'Diddy' Combs and Pharrell Williams partied with the jet-setter in Paris, France at the weekend (17-18Nov12).