The X-Factor Musical I Can't Sing has passed it's toughest test - bagging the seal of approval from Simon Cowell. Cowell praised the show, which was the brainchild of comedian Harry Hill, as 'fantastic'. The music mogul took to Twitter, raving:

Tonight was a special night. The I can't sing opening night was fantastic. Credit to the cast who were on top form. Check out the reviews. — Simon Cowell (@SimonCowell) March 27, 2014

  Attending the opening night with partner Lauren Silverman, the comedy will feature spoofs of iconic X-Factor judges Simon Cowell, Louis Walsh and returning judge Cheryl Cole. The show is now open in the West End, with a sneak peak of the action below... Video via I Can't Sing Musical