The question "what is love?" has perplexed Britons in 2012, according to research by Google.
It compared the "what is" queries from this year with 2011 and found that "what is love?" had the most amount of traffic over a sustained period in 2012 compared with last year. Love was followed in the "what is" category by iCloud, 3G and Scientology.
The data was included in Google's annual 'zeitgeist' lists of the UK's most searched words and terms. In 2012 the top trending search term was "Euro 2012", followed by "Olympic tickets",
Google also revealed the top-trending people of 2012.
Singer Whitney Houston, who died in February, topped the list, followed by the Duchess of Cambridge and Take That star Gary Barlow.
Andy Murray was the most searched for British Olympian, and Usain Bolt topped the global Olympian category.
Children's series Mike The Knight was the top-trending TV show, followed by thriller Homeland and Towie. Gangnam Style, by South Korean singer PSY, was the top-trending song.
X Factor star Lucy Spraggan, who had to pull out of the show because of ill health, was the top-trending music artist, and Jeremy Hunt topped the politicians list, followed by London Mayor Boris Johnson.
Google defines trending searches as queries that have had the highest amount of traffic over a sustained period in 2012 compared with 2011.