38 countries will compete in two semi-finals on Tuesday and Thursday night to win 20 places in Saturday night's final alongside the UK, Spain, France, Italy and host country Germany.
Rehearsing for their big performance, Blue took to the stage in Dusseldorf's Esprit Arena to perform their single 'I Can', offering fans a first look at what to expect at the weekend.
Singing a slightly remixed version of their UK top 20 single, Duncan James, Lee Ryan, Antony Costa and Simon Webbe perform in front of LED screens featuring VTs of themselves.
The foursome recently promised to pose naked if they are victorious in the competition on Saturday night.
The Eurovision Song Contest semi-finals will be shown on Tuesday and Thursday at 8pm on BBC Three. The final will be broadcast live on Saturday at 8pm on BBC One.
> Read our recent interview with Blue
Watch Blue rehearsing their Eurovision performance of 'I Can' below: