The Brit Awards pulled in their lowest audience for a live broadcast of the show with nearly two million fewer viewers than last year, despite featuring global stars such as Beyonce and Katy Perry.
The latest show, screened by ITV, had an average of 4.6 million tuning in to see acts such as One Direction and Arctic Monkeys winning awards.
The figures matched those for 2006 when the show suffered a ratings collapse, but that year was also a pre-recorded programme. It has been broadcast live since 2007 because it was thought the spontaneity of seeing things as they happen would boost audiences.
The total for last night's broadcast also includes viewers watching on ITV's +1 catch-up service which was not available eight years ago, with only 4.2 million actually watching live.
The 2013 show had achieved a 10-year high with 6.5 million and a peak of 7.5 million, while this year's peak was way down, at only five million.
TV chiefs took some comfort from the number of people who sent messages about the show, hitting what is said to be a new record of 4.14 million messages posted on Twitter.
It was way up on the 1.4 million who tweeted about the show in 2013, but in an analysis posted online by Twitter bosses, they said that half those comments were actually people taking part in the "social vote", which was introduced this year allowing fans around the world to choose who took the best video prize.
The number who tweeted about the show itself rose by a third, although the figures released by Twitter were for users around the world rather than just the UK. In addition to being screened by ITV, it was streamed internationally on YouTube which would have driven up the global tweets.
Unsurprisingly One Direction won the video vote, as with 17.8 million followers they had almost three times the number of the four other shortlisted acts in their category combined.
The most retweeted tweet came from band member Harry Styles whose message of thanks to fans was reposted more than 130,000 times.
The show also set a new tweets-per-minute record for a UK TV show with 78,000 tweets every 60 seconds.
The most tweeted about performer of the night was Beyonce, who took to the stage to sing her latest single XO.
The previous record-holder in terms of TV shows was last year's Comic Relief with 1.5 million mentions. Twitter does not include televised sports coverage in its figures.