Hottest celebrity lip-locks!

Bollywood actor Imran Khan's passionate smooch with co-star Poorna Jagannath in his much-awaited flick 'Delhi Belly'.

Let's take a look at some of the most passionate lip-locks till date! Barcelona's player Gerard Pique (L) kissed Colombian singer Shakira after Lionel Messi's goal against Osasuna during their Spanish first division soccer match at Nou Camp stadium in Barcelona on April 23, 2011. (Reuters/Gustau Nacarino)

Rajasthan Royals' Shane Warne spotted kissing British model-actress Liz Hurley after beating Mumbai Indians in an IPL-4 cricket match in Jaipur recently. (/)

Real Madrid's Cristiano Ronaldo (L) kisses his girlfriend Irina Shayk before their Spanish first division soccer match against Real Zaragoza at Santiago Bernabeu stadium in Madrid on April 30, 2011. (Reuters/Andrea Comas)

Britain's Prince William kissed his wife Kate Middleton in the balcony of Buckingham Palace after the couple's wedding on April 29, 2011. (AFP/)

Combo picture shows Britain's Prince Charles kissing Diana, Princess of Wales, during their wedding in London on July 29, 1981, and (on right) Britain's Prince William kissing his wife Kate, Duchess of Cambridge, on the balcony of Buckingham Palace on April 29, 2011 in London. (AFP/)

Jada Pinkett-Smith and husband Will Smith indulged in a steamy lip-lock as the Los Angeles Lakers played the Boston Celtics at the NBA Finals basketball championship in Los Angeles previously. (Reuters/)

Here's the unforgettable Britney-Madonna smooch! (Getty Images/Jeff Kravitz) (/)

Halle Berry scooped up and smooched by Adrien Brody at the '75th Annual Academy Awards'. (Reuters/)

Rachel McAdams and actor Ryan Gosling kissed on stage after winning the 'Best Kiss' award for their screen kiss in the film 'The Notebook' at the 2005 MTV Movie Awards in Los Angeles. (Reuters/)

In this pic, Hollywood couple Tom Cruise and Katie Holmes is seen indulging in a passionate lip-lock. (Reuters/)

Katy Perry and Russell Brand spotted kissing on the red carpet at the 53rd annual Grammy Awards in Los Angeles, California, on February 13, 2011. (Reuters/Danny Moloshok)

Singer Keith Urban seen locking lips with his wife Nicole Kidman on the red carpet at the 83rd Academy Awards in Hollywood, California, on February 27, 2011. (Reuters/)

Actor Russell Brand kissed actress Helen Mirren after she placed her hand and footprints in cement at a ceremony at Grauman's Chinese Theatre on March 28, 2011 in Los Angeles. (AP/Jason Redmond)

In this publicity image released by ABC, actor Charlie Sheen (L) is seen kissing host Jimmy Kimmel on 'Jimmy Kimmel Live' on March 21, 2011, in Los Angeles. (AP Photo/ABC, Richard Cartwright) (/)

Sandra Bullock created waves as she locked lips with Scarlet Johansson on stage earlier. (AP/)

Celebrity socialite Paris Hilton kisses Cy Waits during an promotional event for her shoe collection in Mexico City March 29, 2011. (Reuters/Henry Romero)

Jennifer Lopez kissed Cris Judd after attending Versace's Spring/Summer ready-to-wear women's collections 2002 at a fashion show in Milan. The show was a big hit! (Reuters/)

Sasha Knezevic (L) and Anja Rubik, the models in the advertising campaign for DKNY Women Energizing Eau de Toilette, the new fragrance by DKNY, kiss in the Sephora store in Time Square in New York City on April 22, 2011. (Reuters/)