Q: Context: The Super Bowl 50 Halftime Show took place on February 7, 2016, at Levi's Stadium in Santa Clara, California as part of Super Bowl 50. It was headlined by the British rock group Coldplay with special guest performers Beyonce and Bruno Mars, who previously had headlined the Super Bowl XLVII and Super Bowl XLVIII halftime shows, respectively.

Question: who is singing at half time super bowl 2015? Let's give stream of consciousness first:
To answer this question, we should know that: It was headlined by the British rock group Coldplay with special guest performers Beyonce and Bruno Mars, who previously had headlined the Super Bowl XLVII and Super Bowl XLVIII halftime shows, respectively. Therefore, the final answer is the British rock group Coldplay with special guest performers Beyonce and Bruno Mars.