After already having an extensive group of people opening for them on tour, Coldplay will now be adding Frank Ocean and Roc Nation's Rita Ora to the mix. The two artists will join Coldplay on their European Tour over the next six months, letting their vocals be heard before the rock band takes stage.

Check out the tour dates below:

Coldplay European Tour Dates – Summer 2012
May 18 – Porto, Dragao Stadium – Marina & the Diamonds and Rita Ora
May 20 – Madrid, Vicente Calderon – Marina & the Diamonds and Rita Ora
May 22 – Nice, Stade Charles Herman / Nikaia – Marina & theDiamonds and Rita Ora
May 24 – Turin, Olympic Stadium – Marina & the Diamonds and Rita Ora
May 26 – Zurich, Letzigrund Stadium – Marina & the Diamondsand Rita Ora
May 29 – Coventry – Ricoh Stadium – Robyn and Rita Ora
June 1 – London, Emirates Stadium – Marina & the Diamonds and Ash
June 2 – London, Emirates Stadium – Robyn and Rita Ora
June 4 – London, Emirates Stadium – Robyn and Rita Ora
June 7 – Sunderland, Stadium of Light – Robyn and Rita Ora
June 9 – Manchester, Etihad Stadium – Robyn and Rita Ora
June 10 – Manchester. Etihad Stadium – Robyn and Rita Ora
Aug. 28 – Copenhagen, Parken Stadium – Marina & the Diamondsand Frank Ocean
Aug. 30 – Stockholm, Olympic Stadium – Marina & the Diamondsand Frank Ocean
Sept. 2 – Paris, Stade de France – Marina & the Diamonds and Frank Ocean
Sept. 4 – Cologne, Rhein Energie Stadium – Marina & theDiamonds and Frank Ocean
Sept. 6 – The Hague, Malieveld – Marina & the Diamonds and Frank Ocean
Sept. 12 – Munich, Olympiastadion – Marina & the Diamonds and Frank Ocean
Sept. 14 – Leipzig, Red Bull Stadium – Marina & the Diamondsand Frank Ocean
Sept. 16 – Prague, Slavia Eden Stadium – Marina & theDiamonds and Frank Ocean
Sept. 19 – Warsaw, National Stadium – Marina & the Diamondsand Frank Ocean
Sept. 22 – Hannover, AWD Arena – Marina & the Diamonds and Frank Ocean

Source: Rap-Up