I think the era should look something like this:
1. Diamonds (September 2012, worldwide)
2. Stay (Dec-January 2012-13, worldwide)
3. Pour it Up (January 2013, US urban)
4. Right Now (April 2013, worldwide)
5. Loveeeeeee Song (May 2013, US urban)
6. Jump (July 2013, worldwide, with a remix)
7. Nobody's Business (September 2013, worldwide)
8. No Love Allowed (September 2013, US urban)