People who think she's like Leona are wrong.
For a starter,she has a lower register voice in the same vain as Toni Braxton or whitney Houston and can actually dance.
Leona has yet to release an as uptempo a song as Alexandra's "Bad Boys".
"Forgive me" was half as fast and all she did was prance down a street, walk in the rain, and sit on a chair while the people in the background danced.
And those who are making the comparisons with Rihanna are also wrong IMO.
Alexandra is a MUCH better singer, and again, can dance, unlike Rihanna.
Rihanna only really danced in two of her videos; "If it's Lovin' that you want" which was a way slower song then "Bad Boys" and so the dancing was less involved and in "SOS" where it was less choreographed dancing and more weak free styling which could've been done by anyone. In "Ponda Replay", she kinda just stood on a box and moved her stomach up and down and around. In "Umbrella", she walked around with an umbrella back and over pretty much, maybe swinging it around from time to time.
Also, "Bad Boys" doesn't sound like aything Rihanna has ever released.
If you really want to make comparsons, I would say that Alexandra is much more like Beyonce or Keri Hilson then Leona or Rihanna.
But if you really take notice (with Beyonce being the exception), the girls of Rn' B who can sing great can't usually dance, for instance Mariah, Whitney, Rihanna, Leona, Jennifer Hudson etc
And the girls that can't really sing are really great dancers i.e. Ciara, Christina Milian, Cassie, Amerie, Britney etc.
So Alexandra is a rearity in the music world at the mo in that she can sing and dance.
It's only her, Beyonce, Aguliera and Gaga who can do the two well.