Cross-cultural studies have shown that smiling is used as a means of communicating emotions throughout the world. Smiling is a very easy yet very powerful human expression. In some cases, its a sign of relief after grief, sometimes a smile denotes good times and most of the times its just a measure of acknowledgment. It spreads easy and is often symbiotic; spreading equal joy to the giver and the receiver. A warm smile is more like a universal language of kindness and good will. Smile... for it costs nothing, but its value is incalculable!

Pakistani, Sumira Kamal, 3, who lives next to a wood and coal supplier, looks on smiling, while playing with her friends, unseen, in Islamabad, Pakistan, Jan. 23. (Muhammed Muheisen, AP)


Crystal Quocksister smiles at the Vancouver 2010 Olympics in Vancouver, British Columbia, Feb. 14. (Marcio Sanchez, AP)

Agatha Ruiz de la Prada smiles after her show at the Pasarela Cibeles fashion week in Madrid, Feb. 19. (Daniel Ochoa de Olza, AP)

Angolan children smile as thay play at Lar Kuzola orphanage in Luanda on Jan. 27. The orphanage,sponsored by TOTAL petroleum company and the Angolan government, shelters some 330 deprived children. (Joe Klamar, AFP / Getty Images)


President Barack Obama laughs with aides aboard Air Force One en route to Singapore, Nov. 14, 2009. (Official White House Photo by Pete Souza)

A newly graduated Afghan police officer smiles as he looks towards his colleagues during a graduation ceremony at a police academy in Kabul, Afghanistan, Feb. 3. (Altaf Qadri, AP)

Two boys smile from a car in a street in Port-au-Prince on Jan. 25. (Jean-Philippe Ksiazek, AFP / Getty Images)

Suspected Yemeni Al-Qaeda members Abdullah Ahmed Rehabal-Matari (L) and Amin Abdullah al-Najjar (R) smile behind bars during their trial at a court in Sanaa on Jan. 26. A Yemeni court sentenced seven suspected Al-Qaeda members between five and ten years in jail after convicting them of plotting to attack foreign interests and tourists. (Marwan Naamani, AFP / Getty Images)

Ruth Joanis, 24, smiles after an aid distribution in a center for blind people, damaged by the earthquake that hit Haiti on Jan. 12, in Port-au-Prince, Feb. 2. (Ariana Cubillos, AP)

French ecologist Nicolas Hulot smiles as he arrives at the Bella center of Copenhagen on Dec. 16, 2009 during the COP15 Climate Conference. (Olivier Morin, AFP / Getty Images)

Nung, smiling as she pulls the cart she will use to collect rubbish, after her school day, at the Bantar Gebang landfill site, one of Jakarta's biggest dump sites, on Jan. 26, in Jakarta, Indonesia. Children who live and work at the landfill site are schooled by day before going to help their parents scavenge and sell their finds after classes are over. Around 6,000 metric tons of garbage are dumped daily at the landfill site, and can continue to be following the renewal of the site's contract last year for a further 20 years. (Ulet Ifansasti, Getty Images)


UN staff Jens Kristensen smiles after being rescued from the rubbles of UN Head Quarter after five days of the quake, Jan. 17. (Marco Dormino, AFP / Getty Images)


Miami-based nurse Liana Gold, 46, left, tries to bring a smile to the Mardoche Fevri, 6, left, as she receives medical attention inside United Nations camp near the airport on Jan. 16, in Jacmel, Haiti. (Carl Juste, The Miami Herald / AP)


An internally displaced Afghan child smiles as he looks out from a small window of a shanty, in a refugee camp on a cold day in Kabul, Afghanistan, Feb. 11. (Altaf Qadri, AP)

A soccer fan smiles during the final of their African Cup of Nations soccer match between Egypt and Ghana at the November 11 stadium in Luanda, Angola, Jan. 31. (Themba Hadebe, AP)


A child smiles in a makeshift camp in Port-au-Prince on Jan. 28. (Jean-Philippe Ksiazek, AFP / Getty Images)