"The Magic Key" is a 2003 hip-hop/electronic song recorded by French virtual band One-T + Cool-T. It was the third single from the album The One-T ODC and was released in April 2003. The song samples "Má Hra" (1971 album Nová Syntéza) by Blue Effect, a Czechoslovak progressive rock band.
It was the third most played songs on European radio and television during the third quarter of 2003 and performed one of the longest-running singles in the 2003 French SNEP Singles Charts (41 weeks), peaking at #9. The song was also a top five hit in Denmark, Poland, Germany and Austria, and a top ten hit in Belgium (Wallonia) and Switzerland. To date, it remains One-T's most successful single.
The singer behind Cool-T (rap) is Christine Asamoah.
An animated music video was also released, featuring the characters on the single cover.
In 2015, a French version titled "DJ" featuring the chorus and samples of the song has been released by the French singer Dieselle.
In 2022, a musical based on the story of the song and music video premiered at the Kammertheater in Stuttgart.