Jorge Drexler won for best song and gave the best speech (and the Oscars aren't even over). He sang and said thank you.
Even though he wrote and sang "Al otro lado del rio" in the "The Motorcycle Diaries," the producers of the Oscars didn't allow him to sing it; instead having Carlos Santana and Antonio Banderas perform his song.
So Drexler sang anyway when he won the Oscar. If only more speeches were as good as his performance. Hopefully, the producers will let the people who wrote and performed the songs do them in the future instead of stars. I doubt anyone tuned in because Banderas sang it instead of Drexler.