Their catchy Ketchup Song, also known as Aserje, has sold very well so far this week, and experts are saying it could get to number one.
It has been a hit all over Europe, getting to number one in ten European countries and all over central and South America.
The video for the song features a Macarena-style dance that'll no doubt be a feature of every disco across the land for the rest of the year!
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