It's a frustrating thing most of us have experienced.
鸟叔,江南style A song gets stuck inside of your head, seemingly playing on a permanent loop.
But what are the most difficult tunes to shift - and why do they get stuck in the first place?
Well, now you can find out - because researchers have developed a mathematical formula to explain the phenomena.
The experts claim the formula sheds light on why some musical combinations are unforgettable - and in some cases, inescapable.
These include Happy by Pharrell Williams , the Village People's YMCA and Queen's Bohemian Rhapsody and We are the Champions.
法瑞尔·威廉姆斯(Pharrell Williams)的《快乐》、乡下人(Village People)的《YMCA》、皇后乐队(Queen)的《波希米亚狂想曲》和《我们是冠军》都属于洗脑神曲。
According to the research by the University of St Andrews, the recipe for an earworm has five key components.
圣安德鲁斯大学(University of St Andrews)的研究人员称,制造抓耳歌曲需要满足五个重要条件。
These are receptiveness - how you feel about the song - predictability, surprise, melodic potency - how good the 'hook' is - and rhythmic repetition.
The exact formula was revealed as: Receptiveness + (predictability - surprise) + (melodic potency ) + (rhythmic repetition x 1.5) = earworm.
精确的计算公式是:感受力+(预见性 - 惊喜)+(旋律的影响力)+(有节奏的重复x 1.5) =抓耳歌曲。
Bede Williams, of the University's School of Philosophical, Anthropological and Film Studies, looked at, among other things, a study into the nation's top 20 earworms, commissioned by Heinz to promote their new #cansong TV advert.
该校哲学、人类学和电影研究系的比德·威廉姆斯(Bede Williams)受亨氏公司所托,查看了针对本国前20名抓耳歌曲的研究,以此帮助亨氏改进新的#罐头曲电视广告。
Bede, who is also research co-ordinator of the HARK project, which looks at our listening habits, said: "If you look at the songs which emerged from the research, they all have a distinctive rhythmic fingerprint - if we removed the melody they are recognisable by their rhythm alone.
"If you think of the opening of 'We will rock you' or the chorus of 'Who let the dogs out?' you'd be able to identify the rhythmic hook that persists throughout each song independent of the melody.
"A significant aspect of a successful earworm is also down to a catchy lyric, of which we will all remember for different reasons."
Top 20 earworms
We will rock you - Queen / 《我们将震撼你》-皇后乐队 Happy - Pharrell Williams《快乐》-法瑞尔·威廉姆斯 点击在线欣赏 We are the Champions - Queen《我们是冠军》-皇后乐队 I'm Gonna Be (500 miles) - Proclaimers《我将远涉500英里》-宣告者 YMCA - Village People《YMCA》–乡下人 Bohemian Rhapsody - Queen《波希米亚狂想曲》-皇后乐队 Final Count Down - Europe《最后倒计时》-欧洲乐队 Living on a prayer - Bon Jovi《活在祈祷中》-邦·乔维 Jingle Bells《铃儿响叮当》 Who let the dogs out? - Baha Men《是谁放走了狗》-巴哈人 Gangnam Style - Psy《江南style》-朴载相(鸟叔) Never gonna give you up - Rick Astley《永不放弃你》-瑞克·艾斯里 Don't stop believin' - Journey《一定要相信》-旅行乐队 Uptown funk - Bruno Mars and Mark Ronson《放克名流》-布鲁诺·马尔斯和马克·罗森 Shake it off - Taylor Swift《通通甩掉》-泰勒·斯威夫特 点击在线欣赏 Beat it - Michael Jackson《避开》-迈克尔·杰克逊 Ruby - Kaiser Chiefs《红宝石》-恺撒·切弗斯乐队 The Time Warp - The Rocky Horror show《时间扭曲》-洛基恐怖秀 点击在线欣赏 About the bass - Meghan Trainer《丰满宣言》-梅根·特瑞娜 Karma Chameleon - Culture Club《因果变色龙》-文化俱乐部