More than 30 hot air balloons from 14 countries will fill Chiang Rai's sky with a spectacle of colour, light and sound during the Singha Park Chiang Rai Balloon Fiesta from tomorrow to Sunday.

Hailed as the biggest hot air balloon festival in the Asean region, the festival will feature a grand performance of fancy balloons from all over the world, including the US, England, France, Japan, China and Thailand.

There will be a competition by world-class pilots from 4.30-5.30pm daily, followed by a nightly performance of "Balloon Night Glow", with the projection of vivid lighting, sounds and colours by the lake, from 8-8.30pm.

Visitors will have an opportunity to ride a hot-air balloon and enjoy a balloon playground, one of the main photo attractions. A food festival will be held throughout the five days and famous love-song singers will take turns to perform live from 5pm onwards.

The line-up includes Singto Numchoke on Wednesday; Ae Jirakorn on Thursday; Season Five, Nhaem Ronnadech and Lula on Friday; Tuk Wiyada, Amp Saowaluk, Kob Songsit, Aui Rawiwan and Tu Nantida on Saturday; and Wan Thanakrit and Lipta on Sunday.

Exclusively on Valentine's Day, a special service of "Sky-High Marriage Registration" will be prepared for 20 selected couples.

They will have the chance to ride the hot air balloons to a height where they can confess their love and capture the breathtaking scenery of Chiang Rai's skyline.

There is no admission fee. Visit www.facebook.com/singhaparkchiangrai.