Answer
Found it! It’s Levi Brush by Levi Szekeres:
The font is free for personal use, but commercial use requires the author’s permission. I also found this comments page on the dafont.com, where the font’s author writes:
“The Guetta guy didn’t bothered paying to use the font, but probably it’s not his fault, he must have some ignorant designer. Ironic, if you think of all the copyright issue the musicians have these days.”
Attribution
Source : Link , Question Author : Fisnik Osmani , Answer Author : Ilmari Karonen