Simon Cowell has teased One Direction fans by praising the group's next music video.

As previously reported, the lads recently revealed that they will unleash the track 'Best Song Ever' as their next single.

It will feature in their forthcoming 3D film This Is Us, which is due to hit cinemas in the autumn.

Taking to Twitter today (July 1), Syco boss Cowell said that the boyband's video for the single is better than any visual clip they have done before. He said:

"Hi. A lot has happened in two days...The new one d video for best song ever is their best video ever, these boys are very very smart."

The music mogul meanwhile added that the current X Factor USA auditions are making for some variable results, revealing:

"Denver auditions started today. Some great. Some truly awful. Two more days to go. Two people today were outstanding."

Cowell also mentioned on Twitter that he has become good friends again with Cheryl Cole, who he dumped from the US X Factor in 2011 after only three weeks. He said:

"And I didn't snub Cheryl's party. I just couldn't go because of my filming dates. We are close friends again and I adore her."