Lemma

Lemma is a friendship between Lachy and Emma.

Taking Off!

 * They are both introduced as new Wiggles, along with Simon.
 * They sing together in the first half of "Beep Beep Buckle Up"

Furry Tales

 * They sing "Brush Your Pet's Hair"

Pumpkin Face

 * In "Do the Owl", they do ball-room dancing
 * Emma wakes Lachy up

Go Santa Go!

 * Emma said that Lachy means well when he tries his inventions
 * They both sing "Christmas Picnic"
 * They are dancing with candy cane sticks in "The Holy City (Jerusalem)"

Apples and Bananas

 * To Be Announced

Similarities

 * They're both new
 * They both have christmas bows
 * They both love to sing
 * They're both seen in the Mousetrap Heart music video
 * Like Simon, they don't play guitars but they love playing drums and keyboards better

Song
The Lemma song is "Do the Owl" because they ball-room dance in it.

Video
The Lemma  video is "Taking Off!" because they both make their first appearances in it.

Color
The Lemma color could be either Yellow or Purple because it's their favorite colors.

Animal
The Lemma animal is a Goat because Emma loves goats and so does Lachy.

Episode
The Lemma episode is Emma's Missing Bow because Lachy helps Emma look for her bow.

Series
The Lemma series is Series 7 because they both make debuts.

Wiggle Friend
The Lemma friend is Captain Feathersword because Lachy played Captain in 2011 so Lemma was Cemma for that moment.

Lemma Lovers
If your a Lemma Lover, add your username here linked and in alphabetical order.
 * Sweetsong256
 * The Wiggles (user)
 * Thomasoldschool

Theories
There were a swarm of Lemma shippers commenting on Emma's Christmas Bow on YouTube talking about the different theories of Lemma. These comments were removed by the creator saying "Sorry Lemma fans, Just didn't want to be shipping anything that wasn't 100% true!"
 * 1) Emma and Lachy are related somehow judging by their similar facial features
 * 2) Emma and Lachy are dating judging the fact their both young and always look at eachother lovingly
 * 3) Emma and Lachys friendship goes back before their Wiggle days.

Gallery
See here