There were rumours the duo wouldn't actually turn up to perform after Yulia missed the important final dress rehearsal.
Lena had to perform on her own, just in jeans and a t-shirt. Apparently her partner had a throat infection, but the watching crowd weren't very pleased.
Singers from 26 countries are competing to win the title and the right to host the contest next year.
Lots of the songs will be in English, but there's one entry from Belgium which is in a completely imaginary language!