Who is the most popular singer in the world and why?

On metro lyrics, it said Lady Gaga was the Number 1 singer. The most popular songs by her were Telephone (Lady Gaga and Beyonce), Bad Romance, Alejandro and Paparazzi.

Here are the top 10 singers:

1. Lady Gaga

2. Lil' Wayne

3. Miley Cyrus

4. Rihanna

5. Justin Bieber

6. Kesha

7. Taylor Swift

8. Drake

9. Jay-Z

10. Train