John Travolta and Kelly Preston helped a friend propose at a charity gala in Antibes, France.

The high profile duo looked "elated" when the bride-to-be said yes.

Meanwhile, Leonardo DiCaprio raised $1 million at the event by auctioning off a trip to space with him in 2015, helping organisers raise a record $38 million for HIV/AIDS research.

The 39-year-old 'Wolf of Wall Street' actor was spotted kissing his girlfriend Toni Garrn, 21, passionately after the auction at the Hotel du Cap-Eden-Roc, despite rumours they had recently split.

Other guests at this year's gala included Jane Fonda, Jessica Chastain, Marion Cotillard, Rosario Dawson, Justin Bieber, Michelle Rodriguez, Heidi Klum, Karlie Kloss, Sharon Stone, Irina Shayk and Lara Stone.

An original work of contemporary artist Damien Hirst sold for $15 million, while a 1967 painting of actress Marilyn Monroe by Andy Warhol raised $477,000 for the charity.

Pink has sparked more rumours she is pregnant again.

The 'Just Give Me A Reason' hitmaker, who already has two-year-old daughter Willow with husband Carey Hart, further fuelled speculation she is expecting their second child today (23.05.14), as she appeared to reveal her pregnancy cravings on Twitter.

The 34-year-old star tweeted: "I love that every time I find a box of Girl Scout cookies I'm pregnant. Guilty: I'm having a thin mint:)"

The singer's mysterious comments come shortly after her husband was spotted rubbing her stomach in New York City last month.

An eyewitness previously said: "They were cuddling and he kept rubbing her tummy. She was quick to move his hand away in case anyone saw. But it was pretty obvious."

The 'So What' hitmaker - whose real name is Alecia Hart - admitted last year she is desperate to extend her family because she thinks motherhood is the "best thing".

She said: "I want a basketball team [of kids]. It's [motherhood is] the best thing I've done.

"In 10 years I'll have an 11 year old and an eight year old and a five year old and a three year old and a six month old and 18 dogs, a horse and a pig."

Pink and Carey began dating in 2001, before getting engaged in 2005 after she proposed to the hunk during a motocross race in California.

The couple got married a year later in Costa Rica on January 7, 2006.