Cocomelon

Background
Cocomelon, previously known as checkgate, That's Me On TV and ABC Kid TV, is an educational American YouTube channel owned by Moonbug Entertainment and maintained by Treasure Studio. They are most known for their animated educational videos featuring nursery rhymes and original songs, and, as of July 2021, they are both the second-most viewed and second-most subscribed YouTube channel in the world.

1st Logo (May 1, 2014-August 4, 2014)
Logo: On a stage background with multicolored stars at the top, the word "ABC" in a simplistic kid's font is seen colored in, yellow, and , respectively, curved up to make a semicircle shape. Below is "kid TV" in the same font in and purple. "ABC" zooms up letter by letter to accompany the letter said, "kid" shakes violently and "TV" zooms up. The curtains then open up to the mascot on the stage to start the video.

Variants: In Shapes Song - 31 Kids Songs and Videos | CoComelon Nursery Rhymes & Kids Songs, there is a stage with blue curtains. The letters "A" "B" and "C" appear on the screen one by one, followed by "kid TV" coming up from the bottom. The word "ABC" is colored in red, orange, and blue, while "kid TV" is colored in green and purple. The text is also added with white outlines in it. This was followed by the same animation from the previous logo.

Technique: The letter by letter zooming.

Music/Sounds: A group of children saying the letters that come up, followed by "Twinkle Twinkle Little Star" played on a xylophone.

Availability: Seen on ABC SONG | ABC Songs for Children - 13 Alphabet Songs & 26 Videos on the channel (now named Cocomelon - Nursery Rhymes).

2nd Logo (2015-January 17, 2017)
Logo: On a sky blue background, "A" in with a white outline zooms in then settles. "B" in zooms up too, followed by "C"  zooms up. "kid" in zooms up while shaking then "TV" in  flips down. We zoom out to reveal a TV with a purple interior and antennas with hands holding the sides. A paint model of a ladybug travels and stops to the left of the purple antennas.

Technique: Good mixture of 2D (with no outlines) and paint modeling.

Music/Sounds: Same as the last logo, followed by a honk and a squeak.

Availability: First video this logo appeared in was Animal Fair | CoComelon Nursery Rhymes & Kids Songs. The last video to use this branding was Jack be Nimble + More Nursery Rhymes & Kids Songs - CoComelon.

(January 20, 2017-)
Logo: We open to see a watermelon with a pink, stylized baby-like face with black eyes, red cheek blushes and purple, TV-like antennae on top of of its head sleeping until a ladybug quickly flies from the left side of the screen to the right, causing the watermelon to wake up in surprise and look at the ladybug as it flies in the opposite direction. The watermelon then happily turns around to face the ladybug until it turns to face the camera, this while colorful, stylized letters that spell out "CocoMelon" roll in from the right side of the screen to the center. The letters then quickly spin one one-by-one with the watermelon watching the movement until the same ladybug from before flies in and lands on the watermelon while the letters bounce around, and the watermelon smiles in response.

Variants:
 * On new uploads made after Moonbug Entertainment bought the channel in 2021, the camera zooms out a bit at the end and, under Cocomelon's logo, a byline showing a white stylized "M" in a navy circle appears, and navy letters forming the name "moonbug" slide out of the circle. This variant was first used on Beach Day Song | CoComelon Nursery Rhymes & Kids Songs.
 * On Christmas-themed uploads, the watermelon is on some snow and the background is blue with active snowfall. Green strands of red and green holiday lights are also hung in the top corners of the screen.

Technique: CGI.

Music/Sounds: A fly buzzing sound, a light-hearted kiddy theme, a young child shouting "Cocomelon!" as the letters spin and a squeaky toy sound at the end. On early uploads featuring the Cocomelon name, a man says "ABC Kid TV's new name..." before the child says "Cocomelon!".

Music/Sounds Variant: The holiday variant's music is given a Christmas-styled rendition.

Availability: Current and common. Used at the beginning of every one of their new uploads starting with Down by the Bay | CoComelon Nursery Rhymes & Kids Songs.

Legacy: The popularity of Cocomelon with children is such that the logo is notorious for capturing children's attention, to the point of children having been known to run towards phones playing the logo upon hearing the first note of the theme. This has deeply concerned and disturbed some, given the speed of reaction, and has become part of a wider controversy surrounding the "hypnotic" effects of Cocomelon on young brains.