Top Of The Pops (but of course), 1980.
The Cure will go on to be one of the defining bands of the decade and will appear on the show on many more occasions. ‘A Forest’ was their first Top 40 UK hit, taken from their second album Seventeen Seconds (yes, well done, etc..)
However, given the fact that the performance lasts less than three minutes, and that a young Robert Smith (slim, with very short hair and no make-up) looks less than enamoured to be there (and isn’t remotely even pretending to mime), it’s amazing either side wanted to repeat it after this: