The US megastar was forced to cancel the three Vienna shows of her record-breaking "Eras" tour in the summer of 2024 after authorities warned of the plot by the so-called Islamic State group (IS).Accused of planning the attack and forming an IS cell, the jury found Austrian national Beran A. guilty on all counts after deliberating for hours.The judge then handed him a 15-year jail sentence.While listening to the verdict, Beran A. looked into the court room repeatedly, sniffling loudly, his leg and hands shaking.

Beran A. has pleaded guilty to terror charges © Joe Klamar / AFP

Beran A. went on trial last month on terror offences and other charges in Wiener Neustadt outside Vienna.The defendant -- who was arrested the day before the cancelled concert and has been detained since -- pleaded guilty to all charges except being an accomplice to attempted murder.Bomb-making instructionsBeran A. faced a maximum sentence of up to 20 years in prison.Another 21-year-old, Arda K., who was on trial together with Beran A., was sentenced to 12 years in jail. The sentences can still be appealed.In their closing remarks, both defendants apologised."I just want to say that I'm sorry," Beran A. told the court.