"They Don't Know" is a song produced by Tim & Bob and co-written[2] and performed by American contemporary R&B singer Jon B, issued as the third single from his second studio album Cool Relax.

The radio edit version and its remix sampled "Ten Crack Commandments" and "The World is Filled", both performed by The Notorious B.I.G.

The song is his biggest hit to date on the Billboard Hot 100, peaking at #7 in 1998.

[5] Gunna and Chlöe came together to write the song "You & Me" which sampled some lyrics and the guitar from "They Don't Know".

During an appearance on the podcast Can We Talk RNB?, Jon B. expressed his distaste towards Gunna for sampling his song without his consent.