Every weekday, we bring you the Ad Age/iSpot Hot Spots, new and trending TV commercials tracked by iSpot.tv, a company that catalogs, tags and measures activity around TV ads in real time. The New Releases ran on TV for the first time yesterday. The Most Engaging ads are showing sustained social heat, ranked by SpotShare scores reflecting the percent of digital activity associated with each one over the past week. See the methodology here.

Among the new releases, national chain Party City wants you to know it has stocked its 800-plus stores with cheap, delightfully tacky Cinco de Mayo accessories (think Mexican sombreros and such), Walmart is playing up its array of grocery items ("I went to Walmart and got everything I need to make my specialty, Cheesy Tuna Casserole"), and JC Penney -- whose stock rose earlier this week when the CEO of one of its major suppliers, PVH Corp. (Calvin Klein, Tommy Hilfiger, etc.), said that his company's sales at the department store have been strong -- reminds you that Mother's Day is coming up fast.

Today's TV Ad Highlights

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New Releases

Top new ads recently aired on national TV

Walmart: Cheesy Tuna Casserole

Network: Science Channel

Show: Outrageous Acts of Science

Airing Date: Apr. 30, 6:12 am EST

Party City: Fired Up for Cinco de Mayo

Network: OXYGEN

Show: Celebrities Undercover

Airing Date: Apr. 30, 6:24 am EST

CarFax.com: Car Possum

Network: MLB Network

Show: Quick Pitch

Airing Date: Apr. 30, 3:54 am EST

Wix.com: Drag and Drop

Network: CNN

Show: New Day

Airing Date: Apr. 30, 3:24 am EST

JC Penney: Super Saturday Sale

Network: FX

Show: Two and a Half Men

Airing Date: Apr. 29, 6:16 pm EST

Most Engaging

Top ads by SpotShare for the past 7 days

Samsung Mobile: Everyday Better

Online Views: 4,595,779

Social Actions: 6,241

SpotShare: 5.57%

Apple iPhone: Powerful

Online Views: 1,125,938

Social Actions: 12,218

SpotShare: 3.16%

Foot Locker: No Rings

Online Views: 773,212

Social Actions: 4,284

SpotShare: 1.48%

Yoplait: Taste-Off

Online Views: 908,327

Social Actions: 47

SpotShare: 0.90%

Nassau Paradise Island: Time Stands Still

Online Views: 761,053

Social Actions: 16

SpotShare: 0.75%

View top ads in real time at iSpot.tv

As always, you can find out more about the making of the best commercials on TV at Ad Age's Creativity.

Miss yesterday's batch of Hot Spots? They're right here.