Tanja from Estonia may have borrowed just a tiny bit too much from Loreen's 2012 Eurovision entry. First of all, I don't think these two songs are too similar. Germany's entry from last year was a much more obvious copy of Loreen if so.
You can also borrow quite a lot from other songs without anyone of importance reacting too strongly. There have been some rather spectacular occasions where people have borrowed famous fragments or complete melody lines without any kind of action taken against them.
Or how about this one? When the ESC was held in Gothenburg in 1985, the home entry went down well both with the audience and the juries and ended in 3rd place. No wonder since it sounded and looked professional, with a catchy hook and a good dance routine.
Kikki Danielsson - Bra vibrationer (Sweden 1985)
A Danish team got really inspired and decided to borrow a couple of elements for their own entry for the 1986 national final. The melody line was a bit similar, so they borrowed some or the arrangement. Or most of it, actually.
And as for the performance, wouldn't it be nice to have a male and a female dancer, just like the Swedes? Or why not the same dancers? If they are good once, they must be good twice. And that the female lead decided to choose a pink outfit similar to Kikki's? Pure coincidence, surely.
Lise Haavik - Du er fuld af løgn