By Mia O’Hare Mark Owen has shared the secret behind his six-month transformation ahead of Take That’s tour. The singer, 52, was praised for his youthful looks and was branded “30 years younger” following his recent TV appearance. He has ditched his long hair and moustache for a look more reminiscent of the band’s 90s heyday. Mark has managed to turn back to clock with his appearance, leaving Ant and Dec’s Saturday Night Takeaway viewers full of praise. However, he has revealed it didn’t happen overnight and took six months of hard work. Mark headed to Los Angeles, where he trained at Ultimate…