Beppe Grillo, founder of the Movimento 5 Stelle (Five Star Movement), arrives to speak during a public rally for the political campaign on January 23, 2013 in Pomezia, Italy.

The rise of the protest vote and support for non-mainstream parties in Italy could lead to a surprise in the national election on Sunday,taking key votes away from established candidates in what looks set to be a close race.

As financial scandals hit the banking and business world in Italy and alleged corruption and collusion between politicians and business leaders is exposed, so-called "fringe" parties such as comedian Beppe Grillo's "5 Star Movement" (M5S) have found themselves unexpectedly becoming mainstream contenders in the Italian elections on February 24/25.