Stronger (What Doesn't Kill You)

Digital download (U.K. & FR Amazon edition, FI MTV3 Store edition)
Digital download - The Remixes EP (U.S. Amazon, U.S. iTunes, NO iTunes & Brasil iTunes edition)
"Stronger (What Doesn't Kill You)" (Nicky Romero Club Mix) — 5:52
Digital download - EP (CA, MX & European iTunes edition, BE, NL, AT, PT, ES, PL, IT, CH, SWE, SWI)
European CD single