Songfacts®:

• In this song, Carlisle turns to jelly whenever she's near this irresistible guy. She's got it so bad for him, she can't even speak when he looks in her eyes.
• Hitmaker extraordinaire Diane Warren wrote this song and also another on the album, "World Without You." Her songs are often about the wash of love that happens during peak infatuation. Carlisle was a great singer for this type of song, but Warren could pull it off with just about anyone: her hits include "I Don't Want To Miss A Thing" by Aerosmith, "If I Could Turn Back Time" by Cher and "When I See You Smile" by Bad English.
• This was the second single from Belinda Carlisle's second solo album, Heaven on Earth. Her group The Go-Go's went to #1 with their 1981 debut album Beauty and the Beat, but by their third album in 1984 they had lost their touch and were not enjoying each others' company. When they split in 1985, Carlisle remained signed to their label, I.R.S., which teamed her with top songwriters and musicians, including her Go-Go's bandmate Charlotte Caffey. Her lead single, "Mad About You," set the tone for her solo sound, keeping much of the frothy fun of The Go-Go's but with a more adult sound. It was a hit, but "Heaven Is A Place On Earth," her first single from Heaven on Earth, was even bigger, going to #1 in many countries, including America. With that lead in, "I Get Weak" had little chance of failure.
• The video was directed by the actress Diane Keaton, who also did Carlisle's video for "Heaven Is A Place On Earth." Carlisle married the actor Morgan Mason in 1986, but her love interest in the video is played by Tony Ward, who was one of Madonna's mermen in her "Cherish" video.
• Diane Warren originally thought the song would be a good fit for Stevie Nicks. It was Nicks and her producer who suggested it might be a better fit for Carlisle.