Contestants: Countries A - E
There's something for everyone in this first batch of songs, from Armenia's funky dance music to a bit of Belarussian rock - and even an appearance from a Belgian Elvis.
Biographies and lyrics courtesy of each country's national broadcaster.
"Bistra Voda" is the entry for Bosnia & Herzegovina, performed by the group Regina.
The group Gypsy.cz will be performing the song "Aven Romale" on behalf of the Czech Republic at this year's Eurovision.
Danish solo singer Brinck is heading to Moscow, where he'll perform the song "Believe Again".