Rachael Grieve - UK; Sam Villa Team - USA; David Siero - ES; David Siero - ES; David Siero - ES; Marcos Siero - ES; Siero Hair Studio - ES; Pavel Ockapkin - RU; Pavel Ockapkin - RU; Pavel Ockapkin - RU; Olga García - ES; Olga García - ES; Cos Sakkas - UK; Sabrina Dijkman - NL; Jose Urrutia - ES; Jamie Wiley - USA; Robby Osselaer and Sofie Schrauwen at Bobhead - B; David Corbett - SCO; Encarna Moreno & María Gómez - ES; Rafael Bueno Peluqueros - ES; Yovanka Loria - AU; Art Hair Studios - IT; MITÚ - IT; Mayte Garrote - ES; Lisa Von Kurvink - USA; Juliette den Ouden - NL; David Murray & Katrina Kelly - UK; Felicitas Hair - ES; Darrel Starkey - UK; Erika Dancso - HU; Christian Ríos - ES; Charlie Taylor - UK; Mark Mccharthy - UK; Gary Hooker & Michael Young - UK; Hooker & Young - UK; Juliette den Ouden - NL; Juliette den Ouden - NL; David Siero - ES; Christian Ríos - ES;