Bllled as the biggest annual festival in the country, the 18th installment of Õllesummer kicks off at 17:00 at the Song Festival Grounds and will treat fans of suds and live music to four days of beer-soaked summer fun.

This year, over 2,000 glass steins were imported from Germany for a outdoor area, sponsored by a major German brewer, that seats 1,000.

As far as the beer goes, Beer Summer remains unabashedly positioned as an old-timey lager lover's delight even as a taste for craft beers sweeps many cities. But the name is somewhat of a misnomer, more about live music and atmosphere than tastings, although there is a more intimate wine garden as well where "unplugged" acts will perform.

The out-of-town headliners will take the main stage at 23:00 each night. Manic Street Preachers on Friday, Mika on Thursday and tonight, Alphaville.

On Saturday, though, it's a golden oldie - Ivo Linna, who goes on at 22:30. Other names to watch - and listen to - among the 100 or so performers are Ott Lepland of Eurovision fame, who takes the Estrella stage at 22:30 on Thursday.

There are also plenty of foreign artists on the other stages - most notably Australia's Happy Endings on July 5 and guitar virtuoso Joe Gomm from the UK in the wine garden on July 7.