It’s every producer’s worst nightmare. Everything’s going well, everyone’s done what they needed to do… and suddenly an uninvited guest comes along to potentially spoil the party, live on TV.
Yes, whether it’s a disgruntled awards show loser, an overzealous protester or just a future superstar DJ with a pineapple on his head, a stage invasion is one of those water-cooler moments that get everyone talking.
Here are just 14 of the most shocking and memorable examples...
1. Natalie Holt on 'Britain's Got Talent'
ITV
2. Kanye West at the MTV Video Music Awards
3. Lil Mama at the MTV Video Music Awards
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4. Kanye West (again) at the MTV Europe Music Awards
5. Lee Nelson at Glastonbury
6. Lee Nelson on 'The X Factor'
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7. Calvin Harris on 'The X Factor'
8. Jarvis Cocker at the Brit Awards
9. Brandon Block at the Brit Awards
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10. Fathers 4 Justice on 'Loose Women'
11. Dr A.C on 'The Voice'
12. Protesters on 'Dancing With The Stars'
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13. Jimmy Jump at Eurovision
14. Five men om 'The X Factor'