How much hits did Lady Gaga have in the top ten count down?

As of my last knowledge update in September 2021, Lady Gaga has achieved a total of 14 top ten hits on the Billboard Hot 100 chart in the United States:

1. "Just Dance" featuring Colby O'Donis (2008)

2. "Poker Face" (2008)

3. "LoveGame" (2009)

4. "Paparazzi" (2009)

5. "Bad Romance" (2009)

6. "Telephone" featuring Beyoncé (2010)

7. "Alejandro" (2010)

8. "Born This Way" (2011)

9. "Marry the Night" (2011)

10. "Applause" (2013)

11. "Do What U Want" featuring R. Kelly (2013)

12. "Shallow" with Bradley Cooper (2018)

13. "Rain on Me" with Ariana Grande (2020)

14. "Stupid Love" (2020)

Please note that there may have been additional top ten hits released after September 2021, and you may want to check more up-to-date sources for the latest chart information.