They've only played it a handful of times since 2001.
blink-182 kicked off their massive North American tour last night, celebrating 20 years of their seminal album 'Enema Of The State'.
As they're playing 'Enema' in full on the tour, it's not really a big surprise that as part of their set they played 'Aliens Exist' - but how they did it is a surprise.
Before kicking off 'Aliens Exist', Mark Hoppus said “This song goes out to Tom, where ever he is".
Check out the fan-shot footage of 'Aliens Exist' below:
blink-182 are set to headline Warped Tour tonight in Atlantic City.
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