On this episode Miranda Cosgrove broke her left pinky finger while filming.
Ms. Ackerman's stuffed Panda Pig was actually made from Carly's stuffed animals. That's part of why Carly was so shocked when Spencer says "But she wasn't ".
In real life, copyright infringement is penalized by a fine of $750-$30,000 per work. This means that Miss Ackerman would be facing a fine of somewhere between $375,000 and $15,000,000. However, this amount is only set by statute and a court could potentially decide to fine her even more.
The pig that Ms. Ackerman gets for Spencer. Looks like Arnold Ziffel from Green Acres (1965).