the google search no it's not a reliable source and comes more under the heading of original research there are articles which use google hits frequency of google searches etc to prove a point but never as the sole source for something's notability i don't think i can help you i did do a factiva search yesterday evening and came up with nothing whatever the serbian editors say highly popular political songs do get newspaper coverage outside their country if they really are that notable even if they're in a foreign language der steuersong for example a satirical german song about ex chancellor schr der in german with lots of untranslatable german puns turns up hits on factiva germany may be richer but then we were at war with serbia so i really do believe that someone would have taken notice if the song's notability was as high as is claimed talk