RDC is so overrated omg
but it's a feature & hence the hype is what is causing it to be the most popular song on the album. I mean I can see the Cher Lloyd fans just buying only RDC & not bothering to listen to the rest of the album
MITUSA is the perfect choice. I would pick Two Pieces as a third single, it's one of her few Grammy worthy songs quality wise and could be huge if given the chance imo. RDC could be an international single.
Nightingale is probably too personal to be released as a single for her.