cheer up vs feel happier

Some examples from the web:

• Come on, Johnny, cheer up.
• So don't feel so down, and cheer up.
• Cheer up, I got good news.
• So, my first day of work was a train wreck, but cheer up.
• Should we get one of those "cheer up" ones?
• And, just cheer up, you know.
• Suzu, come on, cheer up.
• cheer up, we'll get through this no bother.
• Cheer up, maybe the lieutenant will let you sell tickets.
• Cheer up, you're bumming out the kids.
• You'll have to cheer up for Emily's birthday.
• Now, cheer up and get dressed for your party.
• Maybe I can cheer up the old sourpuss.
• Thought I'd do a good thing and cheer up Charlie.
• We're just headed out, to cheer up a friend.
• You should cheer up on a day like this.
• Brush off the clouds and cheer up
• Come on, you'll feel younger and he'll cheer up.
• You got one second to cheer up.
• So cheer up, Indiana, and good luck.

Some examples from the web:

• You'll feel happier when the hunting season begins.
• However, I would feel happier knowing the boy has had a full psychiatric evaluation prior to standing trial.
• I feel happier, I am my emotions easily.
• It's not my choice... but I would feel happier with you gone.
• I thought it would make me feel happier, but it actually made me feel kind of lonely.
• I would feel happier and stronger if we vote on it.
• Feel happier and help save the world.
• Mr. Bradbury, would you feel happier working for some other newspaper?
• I feel like I'm a better person and I feel happier - less alone.