Question. Context: "I'm Lovin' It" is a song recorded by American singer-songwriter Justin Timberlake. It was written by Pusha T and produced by The Neptunes.

Question: who sang the mcdonalds jingle im loving it?
Answer. American singer - songwriter Justin Timberlake
What step-by-step reasoning justifies that answer?
Reasoning: To answer this question, we should know that: "I'm Lovin' It" is a song recorded by American singer-songwriter Justin Timberlake.