Rapper Drake stunned fans at his concert in Berlin, Germany on Thursday night (27Feb14) by bringing Kanye West onstage for a surprise performance. The Started From The Bottom hitmaker took his Would You Like A Tour? trek to the O2 World and sent the audience into a frenzy as he was joined by his unannounced guest. As he introduced West to the crowd, Drake took a moment to honour his pal and mentor, saying, "I want you to understand this is my dear friend. This is the reason why I'm standing in front of you today. This is the mentor, this is the God. This is the genius of all geniuses. This is the man that is Kanye motherf**kin' West." The Stronger star then treated the gig-goers to a performance of his track Black Skinhead, much to the delight of the audience. West is the second surprise guest to join Drake onstage during the European leg of his tour - Rihanna hit the stage in Paris, France on Tuesday (25Feb14) to sing their hit song Take Care, before launching into her own tune, Pour It Up.