The rocker was performing with his band as part of the Somerset House Summer Series, and used the gig to attack his sibling, who has enraged him by blaming him for the demise of Oasis.
Noel claimed their relationship began to deteriorate after he refused the singer's request to advertise his Pretty Green clothing label in the Oasis tour programme and culminated with 'The Roller' hitmaker attacking him with a guitar backstage before a festival appearance in Paris in August 2009.
Before introducing the track 'Man of Misery' last night, Liam asked the crowd: "Have we got any Pretty Green in the house? Or are we not allowed to speak about Pretty Green?"
Earlier in the set during 'Beatles and Stones' he also changed the lyrics to "I can't be bought and sold - like some people" and made a hand gesture which seemingly was a reference to his brother's height.
And on the track 'The Morning Son' - which was written by Liam and is widely believed to be about Noel - he changed the lyrics from "you're blinded by what you idolise" to "you're blinded by what f***ing lies".
Earlier this week, the 38-year-old singer accused the guitarist of lying about what happened on the final Oasis tour and admitted the 44-year-old songwriter was "breaking his heart" with his accusations.
Liam said: "Them words, Pretty Green, have never come out of my mouth [to] Noel Gallagher. Ever. So all this about him saying I tried to get Pretty Green in an advertisement or Oasis tour programme is absolute s**t, saying it's the demise of Oasis, I'm not having it.
"He needs to know there's two people to blame for Oasis splitting up and one of them is sitting here right now talking, and the other one's Noel Gallagher. He's breaking my heart."
Beady Eye - which also features Andy Bell, Gem Archer, Chris Sharrock and Jeff Wooton - thrilled the crowd with their set, finishing with an encore of 'Wigwam' and their traditional closing cover of World of Twist's 'Sons of the Stage'.
For more information on the Somerset House Summer Series, go to www.somersethouse.org.uk/music.
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