Which song became Lady Gaga's first single to top the Billbord Hot 100?

Explanation

"The Fame" is the debut studio album by Lady Gaga. It was released on August 19, 2008 through Interscope Records. Promotion was primarily done through "The Fame Ball Tour" and multiple television appearances. The album includes the singles "Just Dance", "Poker Face", "Eh, Eh (Nothing Else I Can Say)", "LoveGame" and "Paparazzi".