Akon is a Rnb singer to be precise, but certain songs can be said to be hip-hop or rap. There is no clear boundary between the three (nor should there be). Anyway, it is generally said to be Rnb. That's it.

Lady Gaga (note that your spelling is incorrect) is pop in general (she is estimated to be the most popular female pop star now and even in the next few years, and the speed of her rise is really amazing). This album, The Fame, should be said to be in the style of dance-pop or electro-pop. After all, these three are not contradictory and are all considered pop. The songs in her album are more electronic dance music.

In addition, Lady Gaga is an artist of Kon Live Distribution, a company owned by Akon.