Jennifer Aniston celebrated her 40th birthday with a lavish party on Saturday night. The former "Friends" star - who turns the landmark age on February 11 - celebrated four days early with a star-studded bash at her Beverly Hills mansion.

Jennifer invited close friends including Courteney Cox and husband David Arquette, Oprah Winfrey, Sheryl Crow, Tobey Maguire and wife Jennifer Meyer, Tom Hanks and Rita Wilson to join her and boyfriend John Mayer at the party.

According to sources, the actress' flirty behavior quashed rumors she has split from the "Gravity" singer.

An insider said: "She looked hot and she and John looked really happy together."

The festivities took place both inside and outside Jennifer's property, with neighbors claiming celebrations lasted well beyond 2 a.m.

The actress recently claimed she has no worries about getting older.

She said: "Everyone's been asking me if I worry about being nearly 40, but no, not really. These days I'm a lot more serene and I'm ready to embrace a new decade."

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