She was a native of Prague. "She was surrounded by family and friends," her family announced on Twitter.
The new category, best gender-neutral artist of the year, replaced the separate best female and best male artist categories from previous Brits award shows.
Adele recently came out with her fourth studio album '30', which became No.1 on the Billboard 200 last week.
The deluxe version of the album, which is Adele's first since she released '25' in November 2015, includes a version of her latest single, 'Easy On Me', with Chris Stapleton.
"Easy On Me" dropped just a day after Adele revealed the release date of her album '30' is on November 19, almost six years to the day since she released her last record.
Adele announced that her forthcoming album will be released on November 19, almost six years to the day since she released her last record.
Adele said the new album explains her life changes but is ultimately a letter to her now 9-year-old son.
Adele's last album '25' was released in 2015.