'Hit 'Em Up Style (Oops!)' by Blu Cantrell (2001) - This track was so popular, it reached number two on the Billboard Hot 100 in 2001.
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'I Believe in a Thing Called Love' by The Darkness (2003) - While this song screams '80s, it was a major hit in 2003, which reached number two on the UK singles chart.
'Whine Up' by Kat DeLuna (2007) - This popular club hit reached number one on the Billboard Dance Club Songs chart. And while DeLuna continued making music, none was as popular as 'Whine Up.'
'Laffy Taffy' by D4L (2005) - This infectious rap track hit number one on the Billboard Hot 100 chart after its release in 2005. It also hit strides in the UK, peaking at number 26.
'Why Can't I?' by Liz Phair (2003)-There's nothing more '00s like this pop rock jam! It reached number 32 on the US Billboard Hot 100, becoming Phair's highest-charting single and only top-40 single.
'Because I Got High' by Afroman(2000)-Written in a few minutes, this song rose to popularity after it was featured on 'The Howard Stern Show.' It became one of the most iconic songs of the early '00s.
'Collide' by Howie Day (2004) - This emotional ballad peaked at number 20 on the Billboard Hot 100, and topped the charts in Canada, Australia, and New Zealand.
'New Soul' by Yael Naïm (2007) - This soulful track by French-Israeli Yael Naïm gained popularity in the US following the commercial for the first generation of Apple's MacBook Air.
'Bulletproof' by La Roux (2009) - Released on the self-titled debut album by the British synth-pop duo of the same name, 'Bulletproof' hit number one in the UK.
'You're Beautiful' by James Blunt (2005) - James Blunt released this 2005 hit. It reached number one on the Billboard Hot 100 and turned 'Back to Bedlam' into the UK's bestselling album of the 2000s.