A source tells Hollywoodlife.com, “Chris pretty much was attached to Rihanna’s side as soon as he arrived. She was sitting next to Jay-Z on the couch sipping Champagne when Chris walked in. Jay-Z and Chris looked ok together but certainly not buddy buddy…You could tell that Jay-Z is protective of Rihanna, like she is his little sister. When Chris got there, Rihanna gave a him a big hug. Everyone just ate food and had drinks. Overall, Rihanna looked really happy to see Chris. It’s obvious that she is just crazy about him, like goo goo crazy!”