"I Just Want to Be Your Everything" is a song recorded by Andy Gibb, initially released in 1977. It reached number 1 on the Billboard Hot 100 for three weeks, starting on the week ending 30 July 1977, and again for the week ending 17 September 1977. It was Gibb's first single released in the United Kingdom and United States. His previous single, "Words and Music" was only released in Australia. It is ranked number 26 on Billboard's 55th anniversary All Time Top 100 list. The song became a gold record.

"I Just Want to Be Your Everything" was written by Barry Gibb in Bermuda as well as "(Love Is) Thicker Than Water" with Andy Gibb credited as co-writer on the latter. It was recorded in October 1976; the sessions were produced mainly by Albhy Galuten and Karl Richardson and with Barry on this track and "(Love Is) Thicker than Water"; Galuten also played keyboards and piano. Eagles guitarist Joe Walsh contributed guitar on this song. The track is a fairly dramatic love song, with the singer declaring his unending passion and stating that without her, he would die.

Andy reveals, "'I Just Want to Be Your Everything' was one of the most meaningful of all form, you know". He later recalls on Barry Gibb's writing style:

"So, once we discussed it all and got the deal together, me and Barry locked ourselves in a bedroom and Barry just started writing. When Barry writes, it is very hard to collaborate with him, because he is so quick. And before I knew it he was starting to do the chorus of ['I Just Want to Be Your Everything'], and I thought, 'Wow what a hook!'. He's an expert at his craft. Within about 20 minutes, he'd written a number one record; and then we went right into another one, ['(Love Is) Thicker than Water']

Two mixes were prepared for the song, the more popular mix was released on the album & as the single version and the earlier mix was used for promotional uses. The promotional version had an additional keyboard that at times competed with the lead vocal. The drummer's high-hat count during both breakdowns was completely mixed out and Gibb's harmony vocal is more prevalent during add-libs.

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