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'Singing' goat causes giggling fits at Worcester Cathedral service

A goat stole the show during a cathedral's animal blessing service by "singing" along to the organ music. 
Two-year-old Pablo's "bah-rilliant" performance at Worcester Cathedral's annual event has made him a social media star.
His vocals led to fits of giggles by staff from Atwell Farm Park near Redditch and cathedral choir members. 
"I think when he was bleating it was all echoing back at him. He was having a lovely time," farm staff said. 
The video of Pablo and his alpaca friends Minstrel and Barnaby was shared by the cathedral on TikTok has since had 1.6m views and 240,000 likes. 
The service was filmed by the BBC's Songs of Praise programme, but it is not clear whether Pablo's exploits will make the final edit.

(https://www.bbc.com/news/uk-england-hereford-worcester-63131251)
What means “giggling fits” ?
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