Simplify the following text for a Grade 9 native English-speaking person.
Original: Girls Aloud have become one of the most successful British pop groups of the 2000s , with a record-breaking twenty consecutive Top 10 singles ( including four number ones ) , five platinum albums ( including two number ones ) and record sales of more than 5 million in the UK .
Simplified: The group achieved a string of twenty consecutive top ten singles ( including four number ones ) and two number one albums in the United Kingdom . All of their albums have been certified platinum , with their greatest hits album The Sound of Girls Aloud selling over one million copies .