While Kim Kardashian was getting married, her ex-boyfriend was in Vegas singing love songs to his adoring fans and his girlfriend Olivia Alvarez.  See pics of Ray J performing inside and Alicia Keys, Jamie Foxx and Pharrell Williams in the Hamptons.

While his ex-girlfriend was off in Montecito getting married, Ray J was with his girlfriend Olivia Alvarez for a dinner date at Sugar Factory American Brasserie at the Paris Las Vegas.

And he came bearing gifts for Olivia.  How convenient with the cameras there.

The couple was in town for Ray J to make an appearance at Chateau Nightclub & Gardens at Paris Las Vegas.

And then Ray J performed a few songs for the audience.

I wonder if he's sending a gift to Kim and Kris? 

And in the Hamptons..............

Alicia Keys was amongst the high-profile celebs who attended a fundraiser for NYC's famed Apollo Theater in the Hamptons last night.

She was joined by Pharrell Williams who posed with Ronald Perelman and Dick Parsons.

Jaime also hit the stage to do his Ray Charles impression.

LA Reid posed with his wife Erica Reid.

And Russell Simmons was there with his model chick of the moment Melissa George.

Photos via Wireimage/Mazur/Angela Weiss