There were frequent arguments between the fans of both groups, though not necessarily violent. One of the important source of information for the youths to stay up-to-date with the rock music developments around the world was Radio Luxembourg. Certain British artists held concerts in Yugoslavia (e.g. The Searchers, The Hollies) and also Yugoslav artists performed around Europe, especially neighbouring Italy and Austria. On the border with Italy, several Yugoslav-Italian beat music festivals took place. In the mid-1960s many bands such as Džentlmeni, Roboti and the reformed Siluete were influenced by the rhythm and blues artists, while others were more pop oriented. Mod oriented bands also emerged. The most popular foreign bands were The Animals, The Byrds, The Monkees The Kinks, The Who, Manfred Mann and others. The garage rock sound (also labeled as "1960s Punk") was also popular. The charismatic frontman of Siluete, Zoran Miščević, became an idol of the new generation and a sex symbol. The band had a bad reputation for causing scandals and riots at their concerts. Their main rivals were the group Elipse, which, after getting a new vocalist, the African student from Congo Edi Dekeng, went on to play soul music. The prominent Croatian singer Tereza Kesovija represented Monaco at the Eurovision Song Contest 1966. One of the most eminent and influential former Yugoslav group formed in the 1960s was Indexi. They were formed in Sarajevo in 1962. In their early beginnings they were notably influenced by The Shadows and later by The Beatles. Along with the numerous evergreen songs they wrote featuring Davorin Popović's trademark nasal voice, they also covered the famous Beatles song "Nowhere Man". In some of their songs they also experimented with the sound in a similar way to "Sgt. Pepper's Lonely Hearts Club Band". Indexi gradually moved to a more psychedelic sound, with more complex guitar and keyboard solos adding occasional folk and even classical music elements. One of the band's notable members Kornelije Kovač, left Indeksi to form another legendary band, Korni Grupa, in Belgrade in 1968. As the end of the 1960s was approaching, the hippie movement expanded around the world as well as in SFR Yugoslavia. Notable group was the Croatian-based Grupa 220, which during a certain period featured Piko Stančić. Later he rose to one of the most important musicians, producers and arrangers in the whole former Yugoslav scene.