Irish singer-songwriter Dolores O'Riordan, frontwoman of the multi-million selling rock band The Cranberries, died suddenly in London on Monday, aged 46, her publicist said.
"Irish and international singer Dolores O'Riordan has died suddenly in London today, family members are devastated," Lindsey Holmes said in a statement.
"The lead singer...was in London for a short recording session," she added. "No further details are available at this time."
A spokeswoman for London's Metropolitan police said officers are "dealing with a sudden death" after they were called to a hotel in Park Lane, in the centre of the British capital, at 9:00am (GMT) this morning.
She did not confirm the identity of the person found.
"A woman in her mid 40s was pronounced dead at the scene," the spokeswoman said.
"At this early stage it is being treated as unexplained and enquiries continue," she added.
Irish Prime Minister Leo Varadkar was among the first to pay tributes, calling O'Riordan "the voice of a generation".
The Cranberries, formed in 1989 but went on a hiatus in 2003.
O'Riordon told AFP in a 2012 interview that "we were stuck in a rut. We just needed a break."
She headed to Canada, where she gave birth to her third child, but The Cranberries reformed in 2009 after getting together for a one-off show.
"At home I'm a house-keeper and a mum. The kids are, like, 'What's for dinner? Where are my clothes?'. On tour it's, like: 'room-service'," she said of the comeback.
She hit the headlines in 2014 after pleading guilty to assaulting three police officers and a flight attendant during a flight from New York to Ireland, and was diagnosed with bipolar disorder shortly afterwards.
The band was forced to cancel 14 concerts last year due to "medical reasons associated with a back problem" for O'Riordan.
The singer's last Facebook posting came shortly before Christmas.
"Hi All, Dolores here. Feeling good! I did my first bit of gigging in months at the weekend, performed a few songs at the Billboard annual staff holiday party in New York with the house band," it read.