Next week's European elections will not only see new members of the European Parliament (MEPs) appointed, the vote will also determine who becomes the next President of the European Commission.
The position of head of the European Union's executive arm is one that remains a mystery to many, but it remains crucial to the future of the EU.
"The Commission President has a big say in the strategy of the European Commission as a whole," Guntram Wolff, director of the European think tank Bruegel, told CNBC in a phone interview. "(They) have a say in what kinds of legislative proposals make it to the table."
Not only does the President play a critical internal role, they also have influence over foreign policy by representing Europe at meetings such as the G8.
And this year, the stakes are even higher for wannabe Commission presidents. Usually, the president is simply nominated by EU member states – but this year, for the first time, the countries will have to take into consideration the results of the parliamentary elections.
The EU hopes this shift will mean that voters will have a say in who takes over at the helm of European Commission.
So who will replace current Commission President José Manuel Barroso? Overall there are six candidates including Alexis Tsipras - leader of the Greek opposition, running for the European Left – as well as Ska Keller and José Bové, both running for the European Green Party. But here's a look at the three frontrunners: