To be fair, her biggest video on youtube is I Wanna Go with 144 million. Her last first single is not at 90 million views, so this seems alright to me?
It just came up at like 10 last night. I also think in genral the views have probably been lagged. That happens when a video has a lot of views in a short time period. It's a 2.8 million now, and they have another 1.6 million from Vevo in addition to various other rips of the video on Youtube's search result pages. She's had over 4.4 million views within the last 13-14 hours. Rihanna's WHYB video had 4.9 million within a day period. I don't think she's doing that poorly.