By Matthias Inverardi and Tom Sims DUESSELDORF (Reuters) – Taylor Swift walked away with four prizes at MTV’s Europe Music Awards on Sunday, including best video for her 10-minute “All Too Well”. Double-award winners included Nicki Minaj for best song and best hip-hop, and the French DJ and record producer David Guetta won the best electronic award and best collaboration. The event, broadcast on MTV from Duesseldorf in western Germany, honoured musicians from Brazil to South Korea. It featured an appearance by Ukraine’s Kalush Orchestra, the winner of this year’s Eurovision Song Contest, which…