This is what I was wearing at the begining of the spot.
LED Christmas Bulb Necklace. Great fun for holiday parties. Perfect also for the host or hostess to wear as they welcome guests. 9 multi-colored plastic LED light bulbs hang on a 34” long necklace. 6 light setting options range from flashing to all on/off. Batteries are included and are replaceable. I don't how long the batteries will last but LED's take very little power and have a long, long burn life. I bought mine on Amazon for $7.99, but I also found one at my local Duane Reade Drug Store for only $4.99. The only difference I see is that the cheaper set has only 3 different flashing light settings while the Amazon set has nine, including steady-on, which the cheaper set doesn't have.
Here's the $7.99 Amazon version. It's Amazon Prime so free 2-day shipping.
And don't forget to check your local drug store. They may have them too.