The recent volcanic eruption in Iceland has been responsible for halting air traffic across Europe, resulting in numerous canceled gigs for musicians.

Several hip-hop artists have been forced to postpone their international shows indefinitely because of the no-fly zone. Nas and Damian Marley, who are currently promoting their album 'Distant Relatives,' were forced to cancel an upcoming show at London's Electric Ballroom on April, 21. Usher, who landed his first Number 1 single on the UK charts in over five years, with his single 'OMG' this past weekend, has also announced the cancellation of a promotional trip across England.

The volcanic ash covering Europe has affected musicians trying to make their way to shows on both sides of the ocean. Several UK bands -- the Cribs, Gary Numan, Frightened Rabbit -- have also been forced to cancel shows in the U.S., including performances at the Coachella music festival, which took place near Palm, Springs California this past weekend.

Experts have explained that the last time Iceland's Eyjafjallajokull volcano erupted -- back in 1821 -- effects lasted well over a year. News that the ash could potentially linger for well over a few months presents a set of issues for upcoming summer festivals. Several U.S. artists, including Jay-Z, Snoop Dogg, Missy Elliott, Drake and Wale are scheduled to hit the UK this summer for performances at Glastonbury and the Wireless Music Festival.