He said: "When I came on I got the chance to play with good players like Cesc Fabregas, Theo Walcott and Nicklas Bendtner. Every time I went through I had a good ball to finish.
"It was great to score a hat-trick - as a striker I'm always looking to score a lot of goals. But it was more important for the team to win because we want to finish the season in the best way we can."
The victory, which kept Arsenal's remote hopes of pipping Manchester United and Chelsea for the Premier League title alive, guaranteed the Gunners third place.
But it was the manner of it that pleased manager Arsene Wenger and left Derby boss Paul Jewell grateful his team's Premier League nightmare is almost over.
Jewell said: "Arsene said to me he wouldn't like to play against his team when they're in that mood. I couldn't agree more."