1. Choker Necklaces
Hillary Duff was looking fine in them years ago, and Jessie J looks on trend in one just a few months ago.
2. Puffer Jackets
Cleopatra rocking the look the first time around, and Lily Allen looking fresh just 79 days ago.
3. Name Necklaces
Which picture is from 2015 and which is from the early 2000s? If it weren't for Carrie Bradshaw's face I would struggle to tell.
4. Crop Tops
Crop tops were everywhere then, and they're everywhere now — both X-tina and Miley will agree.
Backless shoes were hot when Paris wore them in 2000, and they're hot again now as Jessica Alba showed last summer.
6. Ripped and Embellished Jeans
Mischa Barton was all about exposing her knees in 2004, Beyoncé was rocking some jazzy jeans in the Destiny's Child days, and Rihanna was wearing ripped and embellished jeans just the other day.
7. Funny-Coloured Hair
Normal-coloured hair is soooooo 2010 — what you need is some 2000/2015 crazy-coloured hair. Kylie Jenner knows, and so did Gwen Stefani.
8. Bucket Hats
Here we have Brad Pitt wearing a bucket hat in 2002 and then Katy Perry and her fashionable pals sporting them just last year. The trendies are wearing them — they'll be everywhere this summer, just you wait.
Bumbags: WHAT IS NOT TO LOVE? So practical. Carrie knew that in the early '00s, and Will.i.am has not forgotten in 2015.
10. Double Denim
That's Sisqo back in the day and Pixie Geldof looking hot in the year 2015.
Natasha Hamilton from Atomic Kitten looks great in camo in the '00s and Jay Z is still pulling it off today.
12. Crimped Hair
That's Britney in the year 2000 and Beyoncé in 2015. Good news for you is that you can get a pair of Babyliss crimpers on eBay for about 99p.
13. White Suits
The Spice Girls looked the optimum of chic — especially Mel C in her Skechers — and Rita Ora is still rocking that power-suit look 10 years on.
14. Off-the-Shoulder Tops
Emma Watson looks strikingly elegant sporting a Bardot neckline, and Jessica Simpson looked quite cool in one all those years ago.