Britney Spears, Drake, Miley Cyrus all take part in the Ice Bucket Challenge as stars continue to do their bit for charity ~ The Stream Naija

Challenge accepted: Britney Spears thanked her sister for nominating her for the ALC Ice Bucket Challenge in a video she shared on Monday

Britney Spears was all smiles as she accepted the ALS Ice Bucket Challenge.

That is, until she got drenched in cold water.

The 32-year-old pop superstar shared an Instagram video on Monday as she joined the ranks of celebrities promoting awareness of amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease.

Britney looked relaxed as she wore white sunglasses and had her hands on her hips at the start of the short video.

Freezing water: Britney screamed and muttered something after getting drenched

'I want to thank Jamie Lynn Spears for nominating me for the Ice Bucket Challenge and I want to nominate Adam Sandler, David Lucado and Robin Greenhill,' Britney said cheerily referencing the comedian, her boyfriend and her business manager.

The Toxic singer then put her arms to her side and braced herself for the icy dousing but was still surprised by the cold shock.

The singer screamed as the freezing shower knocked off her sunglasses and she started to mutter something before the video ended.

That's cold: Britney reacted as a bucket of freezing ice water was dumped on her head

Sports Illustrated swimsuit model Kate Upton, 22, teamed up with her profession baseball player boyfriend Justin Verlander, 31, as they accepted the challenge in an Instagram video posted on Monday.

Kate challenged her The Other Woman co-stars Cameron Diaz and Leslie Mann and make-up artist Bobbi Brown to the challenge before she and Justin took turns dousing each other.

The model had her blonde hair in a ponytail and wore a white hoodie and black leggings as she got soaked and squealed.

Wait for it: Kate Upton closed her eyes as boyfriend Justin Verlander prepared to douse her with ice water

Cold shower: Justin made sure that Kate was thoroughly soaked

Good sport: Kate squealed and laughed as the water came pouring down

Anna Kendrick participated in the challenge in a short white dress and doused herself after challenging Aubrey Plaza, John Krasinski and Cat Deeley.

Mayim Bialik, Kaley Cuoco, Miley Cyrus, Vanessa Hudgens, James Franco, Behati Prinsloo and Vanilla Ice also shared Instagram videos of themselves on Monday taking part in the awareness campaign.

Vanilla Ice, 46, also took part in the challenge and noted in an Instagram video that his grandfather died from the disease.