Passage: Released in March 1963, the album initiated a run during which eleven of their twelve studio albums released in the United Kingdom through to 1970 reached number one. The band's third single, "From Me to You", came out in April and was also a chart-topping hit, starting an almost unbroken string of seventeen British number-one singles for the Beatles, including all but one of the eighteen they released over the next six years. Issued in August, the band's fourth single, "She Loves You", achieved the fastest sales of any record in the UK up to that time, selling three-quarters of a million copies in under four weeks. It became their first single to sell a million copies, and remained the biggest-selling record in the UK until 1978.Their commercial success brought increased media exposure, to which the Beatles responded with an irreverent and comical attitude that defied the expectations of pop musicians at the time, inspiring even more interest. The band toured the UK three times in the first half of the year: a four-week tour that began in February, the Beatles' first nationwide, preceded three-week tours in March and May–June. As their popularity spread, a frenzied adulation of the group took hold. Greeted with riotous enthusiasm by screaming fans, the press dubbed the phenomenon "Beatlemania". Although not billed as tour leaders, the Beatles overshadowed American acts Tommy Roe and Chris Montez during the February engagements and assumed top billing "by audience demand", something no British act had previously accomplished while touring with artists from the US. A similar situation arose during their May–June tour with Roy Orbison.

Question: What was the phenomenon given to the greetings the Beatles' received from the Fans?
Beatlemania