Jesica Biel Throws Birthday Bash For Justin Timberlake

Justin Timberlake's long time girlfriend, Jessica Biel, threw the 28-year-old an unforgettable birthday party.

According to PEOPLE, Biel surprised Timberlake with a Super Bowl-themed party at an exclusive penthouse at the Hollywood Roosevelt Hotel.

"Justin was totally blown away when he walked in. He had no idea," a source told PEOPLE.

The guest list consisted of the 100 closest family and friends including both of their parents, Timberlake's cousins, Biel's brothers and Timberlake's best friend, Trace Ayala.

What's a Super Bowl party if there isn't any greasy food? Biel's menu contained gourmet buffalo wings, pizza, mini sliders and cupcakes.

PEOPLE reported that Biel planned every detail for this party, making sure everything would be perfect. Flat-screen televisions were brought in for the special occasion.

As the hostess of the party, Biel wore a black cotton dress and flats while working the room and making time to spend with her beau.

"They held hands and relaxed," a source told PEOPLE. "They seemed very happy together."