The loved up couple put their affection for one another on display whilst aboard a luxury yacht on the Hudson in New York City.
The yacht was the location picked for Khloe's lavish celebration, and it apparently was the perfect setting for romance.
The brunette beauty was spotted clutching her rapper boyfriend's face with red painted nails and planting a solid kiss on him.
French, 29, then returned the favour, appearing to have a giggle as he grabbed Khloe's face and showered kisses back on her.
Although the couple have only been an item for a few months, things are really heating up between the two with the rapper showering his girlfriend in gifts for her birthday.
The musician gave Khloe four amazing gifts - a Jeep Wrangler four door SUV, a full finger ring and two grills.
While it may seem fast to some, 30-year-old Khloe has a history of dashing to the alter, after all she married estranged husband Lamar Odom just one month after meeting him.
Khloe was joined on the evening by Kim and Kourtney Kardashian and Kendall and Kylie Jenner as well as her mother Kris, as the famous family partied the night away on the fancy vessel.
