Liam Gallagher gave a stellar performance as he played a gig for just 30 minutes and filled his pockets with an extra £500k.The Oasis star, 49, was payed half a mil to perform at billionaire B&M brother Bobby Arora's birthday bash at the Paris opera House over the weekend.READ MORE: Liam Gallagher fuels Oasis reunion speculation as he confirms 'bags are packed'And despite only taking place for 30 minutes, Liam certainly gave them a bang for their back as he belted his own tracks along with popular Oasis hit Cigarettes and Alcohol.It topped off a busy week of tours for Liam - but he still managed to fit in the quickie set to his busy schedule. An onlooker told The Sun that it was the "party to end all parties".