Hitmaker Adam Lambert will perform a cover of George Michael's iconic single 'Faith' on the finale of ABC’s summer series 'Greatest Hits'. 

The two-hour special is set to air on Thursday, August 4 and it will also see Ariana Grande performing two Whitney Houston covers along with a performance of 'Titanic' theme 'My Heart Will Go On' from non other than Celine Dion. 

As previously reported, Adam Lambert stars in the new production of 'Rocky Horror Picture Show', which is set to air on October 20, and he told press back in May that he was initially wary of the role because the movie is so legendary:

"It's an incredible original film... It's shocking. Especially for then... when I was a kid and I first saw it, I was like 'can they do that?!' That was the thing - it is so iconic and such a cult hit that when I heard they were re-doing it, I was like 'ooh, that's a little risky, how are they going to do that?'"

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Watch Lambert in action here: