1. The act of expressing, conveying, or representing in words, art, music, or movement; a manifestation: an expression of rural values.
2. Something that expresses or communicates: Let this plaque serve as an expression of our esteem.
3. The manner in which one expresses oneself, especially in speaking, depicting, or performing.
4. The outward manifestation of a mood or a disposition: My tears are an expression of my grief.
5. A facial aspect or a look that conveys a special feeling: an expression of scorn.
6. The act of pressing or squeezing out.
7. Genetics The act or process of expressing a gene.
http://www.thefreedictionary.com/expression


"Let us leave the physiognomic riddle of Mona Lisa unsolved, and let us note the unequivocal fact that her smile fascinated the artist no less than all spectators for these 400 years. This captivating smile had thereafter returned in all of his pictures and in those of his pupils. As Leonardo's Mona Lisa was a portrait, we cannot assume that he has added to her face a trait of his own, so difficult to express, which she herself did not possess. It seems, we cannot help but believe, that he found this smile in his model and became so charmed by it that from now on he endowed it on all the free creations of his phantasy".
(Sigmund Freud, Leonardo da Vinci: A study in psychosexuality. tr. A.A. Brill. New York, Vintage Books, [1955] Originally published by Freud in 1910, p. 79.)
From the beginning it was greatly admired and much copied around the world, and it came to be considered the prototype of the Renaissance portrait. It is difficult to discuss this work work briefly because of the complex stylistic motifs which are part of it and everyone's opinion and discovery on the painting. My interpretation of such a clever art of work is based on the perfect beauty of a woman. The slight opening of the lips at the corners of the mouth was considered in that period a sign of elegance. Thus Mona Lisa has that slight smile which enters into the gentle, delicate atmosphere pervading the whole painting.
Music
"To really appreciate the work of a musical artist you have to experience a song through every mechanism available, through the artist's voice, through the specific music instruments, through the carefully selected melodies, through the wonderfully written lyrics. Your first experience of a song and its interpretation should be by audio only. You have to be able to capture its meaning before it is corrupted by a visual expression. A song has to be free to speak a personal message and if a song is able to do that it is only because of artistic perfection. A music video takes away an artist's majestic power of illustration".
Coenraad de Beer http://ezinearticles.com/?Music-Videos---The-Extension-To-Musical-Expression&id=147796
I decided to look at not just baby expressions and shapes but at it from a Painters point of view on different age, body shapes and facial expressions. The Mona Lisa has a devious yet shows some sort of hidden secret behind the eyes and her smile. I took a look at Coenraad de Beer opinion on Music and video clips on how it conveys message to the viewer and to understand that just because there was a video clip for the music it does not mean that it really illustrates the meaning of the lyrics. The logo should clearly target the type of audience that we are trying to capture. Expression can be explosive or subtle depends on what the artists wants to portray.

Fashion
I could talk on and on about fashion, trend and so on but what I have come across is the African fashion and culture. I belive they are the most colourful country and very expressive in showing who they are. Clothing vary from ethnic groups and culture. Even though they come from the one nation they have different identity which comes back from their history. The people of Mende in Sierra Leone will give a cloth to the bride which denoted the "kind of afterlife one will lead". Everytime there is an event such a burial, wedding, birthday or some sort of celebration they would dress up for those occasions. African people truly know how to be colourful.
http://www.transafricaforum.org/reports/clothing_issuebrief0600.pdf
I shouldn't narrow my thought on logo but the overall impression of the company and how the word expression can be playful.....the song I have stuck in my head is "EXPRESS YOURSELF...." from Madonna!!
An individual can express themself through different areas such as fashion, music and through art. I'm sure there are more ways to express ones opinion but I see the most is through these three main stream categories.