Taipei - Pop star Vanness Wu announced on Chinese Valentine's Day on Tuesday that he would wed Singaporean jewellery designer Arissa Cheo.

"I did it on impulse!" he wrote on Weibo, before confirming reports that the two filed a notice of marriage in Singapore on National Day last Friday, after an on-off seven-year romance.

Arriving in Taipei on Tuesday, he told reporters: "It was my birthday last week. Marriage is a gift to myself."

He said they would fix a wedding date only after discussing it with their parents. Asked whether he had broken his vow of abstinence now that he is almost married, he said: "You're a perv."

China Times noted that he was still wearing his purity ring.

Wu, 35, and Cheo, 31, fell in love when making a music video in 2006, according to China Times and Shin Min Daily News.

A one-time television actress, she was a student in the United States then and they split up after a year.

In 2010, after they were seen shopping in Hong Kong, he confirmed that they were back together.

But they broke up again after six months. Shin Min said he had asked her to marry him, but her parents did not approve of her dating an entertainer.

The newspaper said the two rekindled their relationship in 2011, and he finally won over her family.

That year, he attended a birthday bash for her father in Singapore. In March this year, he took a trip to West Lake in Hangzhou with her family.

Reports have said Cheo is from a rich Chinese Indonesian family.

According to her fashion website Carte Blanche X, she grew up in Singapore, Melbourne, Taipei and Los Angeles, and graduated in communication from the University of Southern California.

The US-born, Taiwan-based Wu shot to superstardom as a member of F4, the reel-life clique of TV hit Meteor Garden who became a real-life Mandopop group.

He will be the first of the F4 boys to marry.

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