This summer, Jennifer Lopez jets to Europe to promote her album 'Love?', presumably with countless fashions in tow.

On Saturday in Mallorca, Spain, the 'American Idol' judge made an appearance on the high-spirited hit TV show 'Wettan Das' (a German variety series), to perform and give an interview.

Cameron Diaz, promoting 'Bad Teacher,' and Heidi Klum were also guests on the episode.

The Grammy nominee, 41, sang for fans in a black mini and stillettos.

Host Thomas Gottschalk also welcomed Lopez onto a temporary outdoor set inside a bullfighting arena, to sit on a sofa for a chat. Looking fabulous in a flowing, low-cut maxi dress, Lopez reached down to tame her voluminous skirt and keep it from doing a Marilyn Monroe in the breeze -- and that's when she pulled a brief Janet Jackson on live TV. See a photo of J.Lo's wardrobe malfunction moment, after the jump.