Walmart offers the Alvin and the Chipmunks Singing Holiday Alvin [walmart.com]
for $8.99 with 2-day shipping. (Amazon [amazon.com]
has it for the same with free shipping for Prime members.) Opt for in-store pickup to avoid the $5.99 shipping charge. It says fun phrases when you push its stomach and even sings "Christmas Don't Be Late".
Select stores may have pickup availability before Christmas. (Choose "See more stores" on the product page to see pickup dates for each store.)