A teenager performed a touching song for his brother and sister, who were killed in the A23 horror smash.

Andrew Sharpe, younger brother of Aaron and Katherine, sang a tearful ballad in tribute at their funeral.

Aaron, 20, and Katherine, 18, died when the BMW they were in apparently leapt over the central reservation barrier of the dual carriageway and into an oncoming Land Rover on May 16.

More than 500 people paid their respects at the funeral service yesterday.

Their father Paul compared Aaron to rebellious Fifties film idol James Dean and said he always stuck up for Andrew.

He said: "Aaron was my first-born. There are so many memories but the first one to come to mind is when Andrew was singing on holiday in Paris.

"Andrew was singing his heart out. The others started to tease but Aaron jumped in and said how Andrew was the only one with the bottle to do it.

"Andrew was always proud of that. Aaron was always loyal and generous and protective of his family and friends.

"He's a son any parent would be proud to have. Hollywood produced James Dean, Crawley had Aaron Sharpe."

Ushers had to bring more than two rows of extra chairs for mourners at the Church of Jesus Christ of Latter-day Saints in Crawley.

Mr Sharpe joked that Aaron and Katherine were probably looking down on the congregation and arguing about who attracted the most people.

He said: "Katherine was my angel. She had a beautiful spirit, which meant she was very warm-hearted. She was my little girl and could be anything she wanted to be."

Aaron and Katherine died with their friends Gemma Smoker, 17, of Henshaw Close, Bewbush, Danielle Billingham, 17, who had just moved to Crawley, and Mitch Treliving, 19, from Faygate.

Three people in the Land Rover died - Kate Beasley, 30, her husband Toby, 33, and two-year-old Marcus Mohabir.

Aaron and Katherine's mother Gloria Marshall, fighting back tears, told the congregation: "I want to thank you on behalf of Katherine and Aaron for the times you shared and the memories.

"I'm so grateful they gave me the opportunity to get to know so many of their friends and welcome so many of you into our home.

"I want to thank Gemma's family for sharing in our grief today and letting us share in your grief. They are such a lovely family.

Katherine and Gemma were such great friends and it is good to know we are all good friends too.

"Aaron, although we had our ups and downs, I know how much you love me and I know you know how much I love you.

"You loved your brothers and sisters and always took time to show them how much.

"Katherine, my beautiful, darling daughter, you were a beautiful and sunny, smiling person from the moment you were born. I dressed you in yellow because it reflected your sunny personality. You were a friend to all who knew you and you were my friend too."

Bishop Anton Craggs, conducting the service, said: "They say you can make of men and women by seeing how many turn up at their funeral service.

"Obviously today you can see these two people have touched so many lives."

Aaron's and Katherine's coffins were buried at Snell Hatch Cemetery, Crawley.

They had two older sisters Claire, 26, and Ceri, 28, and another younger brother, Stephen.

More than 300 family members and friends attended a funeral for Gemma Stoker on Tuesday.

Her mother Jackie wept through most of the service at St Alban's Church in Gossops Green, Crawley.

Tributes from friends, read to the congregation by an aunt, included:

"You always said something positive ... you were never fake and always honest ... you were a giver not only of your time but of yourself ... you were never afraid to step out into the unknown."

An uncle said: "On hearing the news and seeing the pictures I thought, 'What a waste of young lives'."

He said Gemma, who lived with her parents in Henshaw Close, Bewbush, Crawley, was a loyal girl with a wonderful smile.

She was destined for a career in hairdressing and looking forward to learning to drive and to her 18th birthday in August.

The Reverend Doris Staniford, who conducted the service, said Gemma's death was not the end but a new beginning for her.

A funeral for Mitch Treliving will be held tomorrow.