Pink pops question to biker beau

Pop star Pink is single no more after getting engaged to longtime boyfriend Carey Hart.

The Trouble singer reportedly proposed to the motorbiking hunk at the weekend during a race in Mammoth, California by holding up a sign that read: "Will you marry me?" as her beau rode past.

As Hart sped past a second time, Pink turned her message over and wrote: "I'm serious!"

Spectators then watched as Hart pulled off the track and smooched with his new fiancee.

The couple met in 2001, but split up briefly last year.