If Paris Hilton is sad about her split from Cy Waits, she sure isn't showing it.

Now living solo, Hilton has been all over the place this week -- and she looks very happy to be single again.

Paris attended two parties last night alone, attending Radioshack's HTC EVO 3D launch party and the opening of Trigg Ison Fine Arts Gallery's new location with a smile on her face. She was even seen earlier in the day wearing a t-shirt with a happy face on it!

Since the breakup, Paris has been spending a lot of time with sister Nicky, as the two danced like crazy at an Electric Daisy Carnival pre-party and attended a Charlotte Ronson event together -- where Paris also re-connected with her "Simple Life" co-star Nicole Richie.

When talking about the split on "Lopez Tonight," Paris said "I love him and we remain really good friends. I feel like the relationship ran its course and we’ll see what happens."

Check out Paris' post-breakup pics!

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