I'm not sure I'd like those pants with any shirt...
I'm in this boat. I know they are in right now but I'm not a huge fan of patterned pants. They have to be styled just the right way to make them not seem dated or grandma-ish.
The pants you posted don't look like the ones she's wearing. I think the pants she chose are horrible. They look like dress slacks and I think to pull off the floral look they need to be more fitted and have a bigger, bolder floral print. I would not try and emulate her look. I like the examples fashionx posted.