Selena especially with her new label, Interscope. It seems like they'll do her justice by the way they "bested multiple suitors" in the end to get her to sign with them.
Miley will probably do around the same or a little less because she won't have that gimmick behind her as she did with WCS and WB.
Demi will probably do better than her best era, HWGA (her fastest selling I think) in terms of selling paced.
Opening Weeks:
Selena: I can see her doing 175k
Demi: I can see 120k-130k
Miley: I can see 220k
I think Selena's and Demi's singles will do well. I'm guessing 3-4 million US for Selena and 2.5 million US for Demi (based upon her other singles but I could be wrong) Demi will probably get another long era or perhaps longer being the label's major artist now since Selena left. I'm not sure about Miley though. Better than CBT but less than B...no shade
Total Sales (including singles)
Selena: WTSGD did over 6.5 WW I think so I expect 8 million WW (including singles)
Demi: I'm gonna bet this will be her first album to sell 1 million WW without a re-release so probably 5-6 million WW
Miley: Based on B...I'm gonna say 8 million +/-
Not trying to offend anyone in this. Some of you take everything I say and just...
Get it together...