"This Time I Know It's for Real" is a song originally recorded by Donna Summer, and released in 1989 as the first single from her album Another Place and Time. Like the rest of the album, the song was written and produced by the British team, though Summer also had a hand in writing this song, as well as three other songs on the album from which this single was released.

It became Summer's biggest hit in the UK since the 1970s (during which time she had been the most popular female disco artist), reaching number three and spending a total of 14 weeks in the Top 75, longer than any of her other singles there. It also reached number 7 in both the US (where it was certified Gold) and Canada, making it Summer's first transatlantic hit since 1979. It was her 14th and final US Top 10 hit. It was also the last Top 40 hit of Summer's career.

This was Summer's first US single to be released on Atlantic Records, a division of Warner Bros. Records. Since 1980 she had been signed to Geffen (also a division of Warner Bros.) but her work across Europe had always been distributed by Warner Bros.' main label. This would continue to be the case following her signing to Atlantic.

The video was directed by Dieter Trattmann.

Australian girl group Young Divas' covered "This Time I Know It's for Real" to coincide with nationwide tour dates from July to August 2006. The song was produced by George Papapetros and Max Kourilov and released as a CD single on May 6, 2006 to attract attention for the tour. "This Time I Know It's for Real" peaked at number two on the ARIA Singles Chart and spent 14 weeks in the top ten. It was certified platinum by the Australian Recording Industry Association (ARIA), for shipments of 70,000 copies. The song was later included on their self-titled debut album Young Divas. Due to an overwhelming response of the Young Divas' version of "This Time I Know It's for Real", a music video was filmed to accompany the song's release.

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