"In My System" is a single by recording artist Tinchy Stryder. It was the first single from his third studio album Third Strike. It was released on August 8, 2010 as a digital download and on August 9, 2010 as a CD single. The single features uncredited vocals from co-writer Ayak Thiik.
Robert Copsey of Digital Spy gave the song a positive review stating: "[Stryder's] latest effort picks up smoothly where last year's 'You're Not Alone' left off. Thankfully, its combination of relatable rhymes and hazy summer synths ensure his formula remains both timely and fresh, resulting in another surefire radio smash."
"In My System" charted at number 10 on the UK Singles Chart on August 15, 2010 becoming Tinchy Stryder's fourth UK top 10 hit and number 3 on the UK Dance Chart. As of 28 February 2012, In My System has shipped 1.2 million copies in the UK and 3.8 million Worldwide.