Juno and Hanna are a brother and sister duo from Johor Bahru, Malaysia.  Saiful Hanif does the the basic song, Hanna Halim writes the melodies & lyrics.  You can see 2 more performance clips plus an interview back at thewknd YT channel.  =D    All 4 clips and a band feature description at the wknd website.

Hear more songs at their SoundCloud

Band history from their Reverbnation site:

Saiful Hanif, formed a band called Juno Hana (2008) consists of five members. 4 siblings and 1 close friend. Hanna Halim as the youngest sibling was involved in the song writing but wasn't actually a member of the band because she was too young. Juno hana gained a few audiences but after a while most of the members carried on with their lives.

Earlier 2012, Hanna Halim at the age of 15, she started songwriting again and wanted to pursue in the music industry seriously. She was determined to make her music known.

By 2013 Saiful and Hanna, decided to form a band called Juno and Hanna as a recognition to the band juno hana in collaboration with HannaHalim.

They mash their unique personalities together to create the music whereas Hanif mostly handles the beats and construction of the music while Hanna creates the melody and writes the lyrics as to what she is inspired off. Most of their songs consists of looping in general, they claim it is to emphasize on a certain beat before moving on to the next.

"Opening for Postiljonen was Juno and Hanna, brother and sister duo. Hailing from Johor Bahru, Malaysia. Although it was their first time performing in Singapore, the synthpop siblings managed to put together a magical performance, where the talented 17-year old Hanna sang melodiously in her saccharine-drenched voice and Juno produced mellow beats with his wine red electronic guitar."