Let's set aside the ugly part of Y2K style and immerse ourselves in the most nostalgic thing about the 2000s: the music. It's the case when the playlist is an age test, and you see a reference to Tokio Hotel's Durch Der Monsun in a photo effect. 

This band was a legend — just as much as your frozen or faded pics will be. A professional Photoshop addon brings the color scheme of 00s music videos, which you can get to photos, posters, cards, branding, stickers, or whatever.